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 A050309 #5 Dec 19 2015 13:18:01 %S A050309 1,-6,1,15,-6,1,1,9,-6,1,-55,16,9,-6,1,29,-39,10,9,-6,1,71,-25,-24,10, %T A050309 9,-6,1,0,46,-9,-30,10,9,-6,1,-27,66,-14,6,-30,10,9,-6,1,-97,-17,77,2, %U A050309 0,-30,10,9,-6,1,-48,-59,30,17,17,0,-30,10,9,-6,1,28,-23,-102,35,33 %N A050309 Matrix 6th power of inverse partition triangle A038498. %e A050309 1; -6,1; 15,-6,1; 1,9,-6,1; ... %Y A050309 Cf. A050305-A050313. %K A050309 sign,tabl %O A050309 1,2 %A A050309 _Christian G. Bower_, Aug 15 1999