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 A244992 Characteristic function for A244991: a(n) = A000035(A061395(n)). 7
 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 COMMENTS If a(n) = 1, then the largest prime p_k [where p_k = A000040(k) = A006530(n) and k = A061395(n)] dividing n has an odd index (i.e. k = 2h+1), otherwise, when a(n) = 0, it means that either n = 1 or the largest prime p_k|n has an even index (k = 2h). LINKS Antti Karttunen, Table of n, a(n) for n = 1..10001 FORMULA a(n) = A000035(A061395(n)). For all n >= 1, a(n) = A066829(A122111(n)) and vice versa, A066829(n) = a(A122111(n)). For all n >= 1, a(n) = 1 - A000035(A244321(n)) and a(A244322(n)) = 1 - A000035(n). PROG (Scheme) (define (A244992 n) (A000035 (A061395 n))) CROSSREFS Cf. A244991, A000035, A006530, A061395, A066829, A122111, A244321, A244322. Sequence in context: A316832 A188973 A188970 * A286685 A284878 A118006 Adjacent sequences:  A244989 A244990 A244991 * A244993 A244994 A244995 KEYWORD nonn AUTHOR Antti Karttunen, Jul 21 2014 STATUS approved

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Last modified January 22 09:44 EST 2019. Contains 319363 sequences. (Running on oeis4.)