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 A318476 Multiplicative with a(p^e) = 2^A000108(e). 2
 1, 2, 2, 4, 2, 4, 2, 32, 4, 4, 2, 8, 2, 4, 4, 16384, 2, 8, 2, 8, 4, 4, 2, 64, 4, 4, 32, 8, 2, 8, 2, 4398046511104, 4, 4, 4, 16, 2, 4, 4, 64, 2, 8, 2, 8, 8, 4, 2, 32768, 4, 8, 4, 8, 2, 64, 4, 64, 4, 4, 2, 16, 2, 4, 8, 5444517870735015415413993718908291383296, 4, 8, 2, 8, 4, 8, 2, 128, 2, 4, 8, 8, 4, 8, 2, 32768, 16384, 4, 2, 16, 4, 4, 4, 64, 2, 16, 4, 8, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Antti Karttunen, Table of n, a(n) for n = 1..511 FORMULA a(n) = 2^A318475(n). PROG (PARI) A000108(n) = (binomial(2*n, n)/(n+1)); A318476(n) = factorback(apply(e -> 2^A000108(e), factor(n)[, 2])); CROSSREFS Cf. A000108, A318475. Cf. also A069739. Sequence in context: A318312 A318474 A278525 * A226083 A182730 A214560 Adjacent sequences:  A318473 A318474 A318475 * A318477 A318478 A318479 KEYWORD nonn,mult AUTHOR Antti Karttunen, Aug 29 2018 STATUS approved

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Last modified June 26 20:37 EDT 2019. Contains 324380 sequences. (Running on oeis4.)