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 A076142 a(n) = A064097(n) - A003313(n). 8
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,129 COMMENTS The positions where k = 0, 1, 2, ... occur for the first time are 1, 23, 129, 517, 2049, 4613, 33097, 33793, ... factorized as: 1, 23, 3*43, 11*47, 3*683, 7*659, 23*1439, 47*719, ... - Antti Karttunen, Aug 18 2017 LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 (also based on the b-file of A003313) FORMULA It seems that sum(k = 1, n, a(k)) * log(n)/n^2 -> c (0.006 < c < 0.01). CROSSREFS Cf. A003313, A064097, A076091. Sequence in context: A110515 A071936 A005088 * A084904 A084928 A112316 Adjacent sequences:  A076139 A076140 A076141 * A076143 A076144 A076145 KEYWORD nonn AUTHOR Benoit Cloitre, Oct 31 2002 EXTENSIONS Extended to 129 terms by Antti Karttunen, Aug 18 2017 STATUS approved

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Last modified December 12 17:59 EST 2019. Contains 329960 sequences. (Running on oeis4.)