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 A125785 #3 Mar 30 2012 18:37:02 %S A125785 1,6,29,141,739,4276,27483,195978,1544074,13371684,126591212, %T A125785 1303252476,14517950305,174196495882,2241822436160,30826098464147, %U A125785 451299846525541,7012090426122158,115289977296253757,2000463474160276658 %N A125785 Column 5 of table A125781. %C A125785 A091352 equals column 1 of both table A125781 and triangle A091351. %F A125785 a(n) = A091352(n+2) - 2*A091352(n+1). a(n) = A125782(n+1) - A125783(n+1). %e A125785 A091352 begins: [1, 2, 4, 9, 24, 77, 295, 1329, 6934, 41351, ...]; %e A125785 a(5) = A091352(8) - 2*A091352(7) = 6934 - 2*1329 = 4276. %Y A125785 Cf. A125781; other columns: A091352, A125782, A125783, A125784, A125786. %K A125785 nonn %O A125785 0,2 %A A125785 _Paul D. Hanna_, Dec 09 2006