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 A278544 #5 Dec 12 2016 09:12:09 %S A278544 0,1,1,5,1,21,8,31,1,123,55,459,12,705,71,247,1,951,460,14175,119, %T A278544 49275,2825,19305,18,30075,3745,105975,167,40845,886,2927,1,11091, %U A278544 5585,789075,1554,10546875,175175,4276125,275,14482125,1004500,186553125,13573,77371875,264775,1656585,24,2599275,354515,169509375,19789,566409375,2055550,48691125,311 %N A278544 Arithmetic derivative of the prime-factorization representation of the n-th Stern polynomial: a(n) = A003415(A260443(n)). %H A278544 Antti Karttunen, <a href="/A278544/b278544.txt">Table of n, a(n) for n = 0..1024</a> %F A278544 a(n) = A003415(A260443(n)). %Y A278544 Cf. A003415, A260443, A278530. %K A278544 nonn %O A278544 0,4 %A A278544 _Antti Karttunen_, Dec 11 2016