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 A177236 #4 Mar 30 2012 17:40:23 %S A177236 0,0,0,0,1,0,1,1,2,1,2,1,4,3,2,2,5,3,5,4,5,4,5,4,8,7,6,5,8,5,8,8,10,9, %T A177236 8,6,11,10,9,8,13,10,13,12,11,10,11,10,16,14,14,13,16,13,14,13,16,15, %U A177236 16,13,20,19,16,16,19,16,19,18,19,16,19,17,25,24,21,20,21,18,21,20,24,23 %N A177236 a(n) = A049820(n) - A177235(n). %C A177236 Number of non-divisors k of n, 1<k<n, for which floor(n/k) is even. [From _R. J. Mathar_, May 24 2010] %Y A177236 Cf. A000005, A049820, A177235 %K A177236 nonn %O A177236 1,9 %A A177236 _Omar E. Pol_, May 23 2010 %E A177236 Terms from a(16) onwards from _R. J. Mathar_, May 24 2010