This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A265397 #7 Dec 18 2015 11:22:13 %S A265397 0,0,0,0,0,4,0,0,0,4,8,4,0,12,0,0,0,4,8,12,16,16,8,12,0,12,24,12,0,28, %T A265397 0,0,0,4,8,28,16,24,24,36,32,40,32,32,16,40,24,28,0,28,24,36,48,40,24, %U A265397 36,0,28,56,28,0,60,0,0,0,4,8,60,16,40,56,52,32,48,48,72,48,64,72,68,64,72,80,72,64,84,64,64,32 %N A265397 a(n) = n - A264977(n). %C A265397 Note that A264977(n) gives the value of the n-th Stern polynomial (cf. A260443, A125184) evaluated at X=2 over the field GF(2), while n gives the value of the same polynomial evaluated at X=2 in the usual way. %C A265397 Each term seems to be a multiple of 4. %H A265397 Antti Karttunen, <a href="/A265397/b265397.txt">Table of n, a(n) for n = 0..8191</a> %F A265397 a(n) = n - A264977(n). %o A265397 (Scheme) (define (A265397 n) (- n (A264977 n))) %Y A265397 Cf. A125184, A260443, A264977. %Y A265397 Cf. A023758 (positions of zeros). %K A265397 nonn %O A265397 0,6 %A A265397 _Antti Karttunen_, Dec 16 2015