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 A139796 #2 Mar 30 2012 18:51:58 %S A139796 1,1,2,5,9,28,48,165,275,1001,1638,6188 %N A139796 Last term of A139687(n) with a fourth leading 1 = 1, 1, 1, 1, 2, 2, 1, 3, 5, 5 rows. %C A139796 Based on sequences identical to their p-th differences. %F A139796 Odd rows are 1; 1, 2, 2; 1, 3, 6, 9, 9; 1, 4, 10, 20, 34, 48, 48; 1, 5, 15, 35, 70, 125, 200, 275, 275; 1, 6, 21, 56, 126, 252, 461, 780, 1209, 1638, 1638; with respective sums second bisection a(2n+1)= 1, 5, 28, 165, 1001, 6188 = A025174(n+1)? %Y A139796 Cf. A094600. %K A139796 nonn,uned %O A139796 0,3 %A A139796 _Paul Curtz_, Jun 14 2008