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 A236379 #9 Mar 01 2014 14:15:34 %S A236379 0,0,0,0,0,4,0,0,0,12,8,0,0,0,0,12,0,64,24,0,16,28,0,16,0,0,0,36,0,4, %T A236379 24,0,0,60,128,56,48,0,0,60,32,0,56,32,0,144,32,0,0,28,0,192,0,4,72,0, %U A236379 0,60,8,0,48,0,0,84,0,376,120,0,256,52,112,112,96,0,0,276,0,100,120,96,64,88,0,148,112,644,64 %N A236379 How much n increases when it is remultiplied from GF(2)[X] to Z: a(n) = A234742(n) - n. %C A236379 All terms are divisible by 4. %H A236379 Antti Karttunen, <a href="/A236379/b236379.txt">Table of n, a(n) for n = 0..8191</a> %F A236379 a(n) = A234742(n) - n. %F A236379 For all n, a(A091209(n)) > 0, and also a(A236844(n)) > 0 and a(A236835(n)) > 0. %o A236379 (Scheme) (define (A236379 n) (- (A234742 n) n)) %Y A236379 A235035 gives the positions of zeros. %Y A236379 Cf. also A234742, A236378, A236380, A091209, A236835, A236844. %K A236379 nonn %O A236379 0,6 %A A236379 _Antti Karttunen_, Jan 24 2014