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 A101554 #3 Mar 30 2012 18:59:02
%S A101554 1,2,14,28,254,508,3556,7112,65534,131068,917476,1834952,16645636,
%T A101554 33291272,233038904,466077808,4294967294,8589934588,60129542116,
%U A101554 120259084232,1090921692676,2181843385352,15272903697464,30545807394928
%N A101554 Second inverse mod 2 binomial transform of 2^n.
%C A101554 Interpolated zeros suppressed.
%F A101554 a(n)=sum{k=0..n, (-1)^A010060(n-k)*mod(binomial(n, k), 2)A100735(k)}.
%K A101554 easy,nonn
%O A101554 0,2
%A A101554 _Paul Barry_, Dec 06 2004