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A242215
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a(n) = 18*n + 5.
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2
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5, 23, 41, 59, 77, 95, 113, 131, 149, 167, 185, 203, 221, 239, 257, 275, 293, 311, 329, 347, 365, 383, 401, 419, 437, 455, 473, 491, 509, 527, 545, 563, 581, 599, 617, 635, 653, 671, 689, 707, 725, 743, 761, 779, 797, 815, 833, 851, 869, 887, 905, 923, 941, 959
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OFFSET
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0,1
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COMMENTS
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Conjecture: there are infinitely many composite Fermat numbers such that no one of them has a divisor that belongs to this sequence.
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LINKS
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FORMULA
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G.f.: (5 + 13*x)/(1 - x)^2.
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MAPLE
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seq(18*n+5, n=0..53);
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MATHEMATICA
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Table[18*n + 5, {n, 0, 53}]
LinearRecurrence[{2, -1}, {5, 23}, 60] (* Harvey P. Dale, Aug 25 2017 *)
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PROG
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(Magma) [18*n+5: n in [0..53]];
(PARI) for(n=0, 53, print1(18*n+5, ", "));
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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