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A284124
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Remainder when 4*n is divided by A005185(n).
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1
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0, 0, 0, 1, 2, 0, 3, 2, 0, 4, 2, 0, 4, 0, 0, 1, 8, 6, 10, 8, 0, 4, 8, 0, 2, 6, 12, 0, 4, 8, 4, 9, 13, 16, 14, 11, 8, 20, 9, 6, 3, 7, 4, 8, 12, 16, 20, 0, 4, 0, 24, 12, 4, 6, 10, 0, 4, 22, 12, 16, 20, 24, 12, 25, 12, 36, 23, 8, 3, 0, 25, 22, 12, 23, 20, 31, 14, 32, 29, 19, 16
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OFFSET
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1,5
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LINKS
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FORMULA
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EXAMPLE
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a(5) = 2 because remainder when 4*5 = 20 is divided by A005185(5) = 3 is 2.
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MATHEMATICA
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a[1] = a[2] = 1; a[n_] := a[n] = a[n - a[n - 1]] + a[n - a[n - 2]]; Table[Mod[4 n, a@ n], {n, 81}] (* _Michael De Vlieger_, Mar 20 2017 *)
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PROG
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(PARI) a=vector(1000); a[1]=a[2]=1; for(n=3, #a, a[n]=a[n-a[n-1]]+a[n-a[n-2]]); vector(1000, n, (4*n)%a[n])
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CROSSREFS
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KEYWORD
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AUTHOR
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_Altug Alkan_, Mar 20 2017
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STATUS
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approved
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