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 A140190 #2 Mar 31 2012 10:31:22 %S A140190 1,1,3,5,9,15,27,44,71,113,176,271,413,621,927,1375,2004,2924,4213 %N A140190 a(n) is the number of groupoids (categories all of whose morphisms are invertible) with m morphisms and m-n objects for any m>=2n. %C A140190 Limiting values of A140188, i.e., a(n) = T140188(m,m-n) for any m>=2n. %K A140190 nonn %O A140190 0,3 %A A140190 _Benoit Jubin_, May 12 2008