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 A174669 #4 Jun 02 2025 02:44:49 %S A174669 1,1,1,1,4,1,1,10,10,1,1,24,32,24,1,1,58,88,88,58,1,1,140,236,256,236, %T A174669 140,1,1,334,628,712,712,628,334,1,1,784,1648,1984,1984,1984,1648,784, %U A174669 1,1,1810,4240,5536,5536,5536,5536,4240,1810,1,1,4116,10676,15296,15776 %N A174669 Sequence A154690 adjusted to leading one:t(n,m)=A154690(n,m)-A154690(n,0)+1. %C A174669 Row sums are: %C A174669 1, 2, 6, 22, 82, 294, 1010, 3350, 10818, 34246, 106834,... %F A174669 t(n,m)=A154690(n,m)-A154690(n,0)+1 %e A174669 {1}, %e A174669 {1, 1}, %e A174669 {1, 4, 1}, %e A174669 {1, 10, 10, 1}, %e A174669 {1, 24, 32, 24, 1}, %e A174669 {1, 58, 88, 88, 58, 1}, %e A174669 {1, 140, 236, 256, 236, 140, 1}, %e A174669 {1, 334, 628, 712, 712, 628, 334, 1}, %e A174669 {1, 784, 1648, 1984, 1984, 1984, 1648, 784, 1}, %e A174669 {1, 1810, 4240, 5536, 5536, 5536, 5536, 4240, 1810, 1}, %e A174669 {1, 4116, 10676, 15296, 15776, 15104, 15776, 15296, 10676, 4116, 1} %t A174669 a = 2; b = 1; %t A174669 t[n_, m_] = (a^m*b^(n - m) + b^m*a^(n - m))*Binomial[n, m]; %t A174669 Table[Table[t[n, m] - t[n, 0] + 1, {m, 0, n}], {n, 0, 10}]; %t A174669 Flatten[%] %Y A174669 A154690(n, m) %K A174669 nonn,tabl,uned %O A174669 0,5 %A A174669 _Roger L. Bagula_, Mar 26 2010