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 A052308 #9 Dec 19 2015 12:49:32 %S A052308 1,-1,1,0,-1,1,0,0,-1,1,0,1,-1,-1,1,0,0,1,-1,-1,1,0,-1,2,1,-2,-1,1,0, %T A052308 -1,0,2,1,-2,-1,1,0,0,-4,2,4,1,-3,-1,1,0,4,-7,-4,6,4,0,-3,-1,1,0,8,-2, %U A052308 -14,-2,7,7,0,-4,-1,1,0,2,24,-16,-30,3,17,5,-1,-4,-1,1,0,-34,85,19 %N A052308 Triangle: matrix inverse of A052307. %H A052308 <a href="/index/Br#bracelets">Index entries for sequences related to bracelets</a> %e A052308 1; -1,1; 0,-1,1; 0,0,-1,1; 0,1,-1,-1,1; ... %Y A052308 Column 1 in A052309. %K A052308 sign,tabl %O A052308 0,24 %A A052308 _Christian G. Bower_, Dec 15 1999