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 A103721 #3 Oct 12 2012 14:40:23 %S A103721 1,16,196,2282,26985,332598,4318985,59335265,863276986,13293822542, %T A103721 216384972440,3716485452680,67227576292304,1278312555078496, %U A103721 25502239872984528,532814523875346960,11637791340592658976 %N A103721 Column m=4 sequence of triangle A103718(n,m), n>=0, without leading zeros. %F A103721 a(n)= |S1(n+5, 5)| + |S1(n+5, 6)|= |S1(n+6, 6)|-(n+4)*|S1(n+5, 6)|, with S1(n, m):= A048994(n, m), n>=>m=0 (Stirling1 triangle). %K A103721 nonn,easy %O A103721 0,2 %A A103721 _Wolfdieter Lang_, Feb 24 2005