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 A245836 #7 Aug 04 2014 08:33:14 %S A245836 0,2,1,8,4,8,4,24,12,18,9,28,14,22,11,64,32,42,21,56,28,40,20,80,40, %T A245836 54,27,72,36,52,26,160,80,98,49,120,60,80,40,152,76,98,49,124,62,86, %U A245836 43,208,104,130,65,160,80,108,54,200,100,130,65,164,82,114,57 %N A245836 Row sums in triangle A053398 (Kopper's Nim values). %C A245836 a(2*n) = 2*a(2*n+1). %H A245836 Reinhard Zumkeller, <a href="/A245836/b245836.txt">Table of n, a(n) for n = 1..1000</a> %o A245836 (Haskell) %o A245836 a245836 = sum . a053398_row %K A245836 nonn %O A245836 1,2 %A A245836 _Reinhard Zumkeller_, Aug 04 2014