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A256643
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a(n) = B*C*(n mod A) + 2*A*C*(n mod B) + 3*A*B*(n mod C) with A=3, B=5, C=11.
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4
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166, 332, 333, 499, 335, 336, 502, 668, 669, 505, 176, 177, 343, 509, 180, 346, 512, 513, 679, 515, 516, 187, 353, 354, 190, 356, 357, 523, 689, 360, 526, 692, 198, 364, 200, 201, 367, 533, 534, 370, 536, 537, 703, 374, 45, 211, 377, 378, 544, 380, 381, 547
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OFFSET
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1,1
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COMMENTS
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After 0 it cycles again from 166 (a(165)=0 so there are 165 (A*B*C) terms).
This is another variation on A256496, where a(n) = B*C*(n mod A) + A*C*(n mod B) + A*B*(n mod C), modified to take the values A=3, B=5, C=11 and still maintain the equivalence a(n) mod ABC = n mod ABC.
Here modification is required (to maintain that equivalence) so that 'BC' + 'AC' + 'AB' = ABC + 1 where 'BC', 'AC' and 'AB' are the coefficients. Therefore, a(n)= B*C*(n mod A) + 2A*C*(n mod B) + 3A*B*(n mod C) so that 5*11 + 2*3*11 + 3*3*5 = 3*5*11 = 55 + 66 + 45 = 166.
This is an example with 2 modifications.
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (-2, -3, -3, -3, -2, -1, 0, 0, 0, 0, 1, 2, 3, 3, 3, 2, 1).
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FORMULA
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G.f.: -x*(824*x^15 +2306*x^14 +4280*x^13 +5921*x^12 +7229*x^11 +7710*x^10 +7530*x^9 +6855*x^8 +6180*x^7 +5505*x^6 +4830*x^5 +3826*x^4 +2659*x^3 +1495*x^2 +664*x +166) / ((x -1)*(x^2 +x +1)*(x^4 +x^3 +x^2 +x +1)*(x^10 +x^9 +x^8 +x^7 +x^6 +x^5 +x^4 +x^3 +x^2 +x +1)). - Colin Barker, Apr 14 2015
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PROG
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(Magma) A:=3; B:=5; C:=11; [B*C*(n mod A)+2*A*C*(n mod B)+3*A*B*(n mod C): n in [1..165]]; // Bruno Berselli, Apr 14 2015
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CROSSREFS
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Cf. A255818 for an example with 1 modification and A256668 for 3 modifications.
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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