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 A050308 #5 Dec 19 2015 13:18:19 %S A050308 1,-5,1,10,-5,1,5,5,-5,1,-35,15,5,-5,1,4,-20,10,5,-5,1,36,-26,-10,10, %T A050308 5,-5,1,21,10,-11,-15,10,5,-5,1,15,41,-25,-1,-15,10,5,-5,1,-51,21,40, %U A050308 -10,-6,-15,10,5,-5,1,-59,0,36,5,0,-6,-15,10,5,-5,1,-34,-15,-24,30,20 %N A050308 Matrix 5th power of inverse partition triangle A038498. %e A050308 1; -5,1; 10,-5,1; 5,5,-5,1; ... %Y A050308 Cf. A050305-A050313. %K A050308 sign,tabl %O A050308 1,2 %A A050308 _Christian G. Bower_, Aug 15 1999