# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a076142 Showing 1-1 of 1 %I A076142 #16 Aug 18 2017 09:44:47 %S A076142 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, %T A076142 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, %U A076142 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 %N A076142 a(n) = A064097(n) - A003313(n). %C A076142 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 %H A076142 Antti Karttunen, Table of n, a(n) for n = 1..10000 (also based on the b-file of A003313) %F A076142 It seems that sum(k = 1, n, a(k)) * log(n)/n^2 -> c (0.006 < c < 0.01). %Y A076142 Cf. A003313, A064097, A076091. %K A076142 nonn %O A076142 1,129 %A A076142 _Benoit Cloitre_, Oct 31 2002 %E A076142 Extended to 129 terms by _Antti Karttunen_, Aug 18 2017 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE