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 A103719 #6 Jun 29 2020 10:48:47 %S A103719 1,7,45,310,2359,19901,185408,1896380,21163076,256176052,3345574440, %T A103719 46910470152,703146058224,11222813318544,190069993713024, %U A103719 3404916420352128,64333503601542144,1278725806081645056 %N A103719 Column m=2 sequence of triangle A103718(n,m), n >= 0 (without leading zeros). %F A103719 a(n) = |S1(n+3, 3)| + |S1(n+3, 4)| = |S1(n+4, 4)| - (n+2)*|S1(n+3, 4)|, with S1(n, m):= A048994(n, m), n >= m >= 0 (Stirling1 triangle). %Y A103719 Cf. A048994, A103718. %K A103719 nonn,easy %O A103719 0,2 %A A103719 _Wolfdieter Lang_, Feb 24 2005