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 A141690 #17 Nov 26 2021 12:57:34 %S A141690 1,1,1,1,6,1,1,19,19,1,1,48,126,48,1,1,109,594,594,109,1,1,234,2367, %T A141690 4812,2367,234,1,1,487,8565,31203,31203,8565,487,1,1,996,29188,176412, %U A141690 312310,176412,29188,996,1,1,2017,95644,910300,2620582,2620582,910300 %N A141690 Triangle t(n,m) = 2*A008292(n+1,m+1) - A007318(n,m), a linear combination of Eulerian numbers and Pascal's triangle, 0 <= m <= n. %C A141690 Row sums are 1, 2, 8, 40, 224, 1408, 10016, 80512, 725504, 7257088, ... = 2*(n+1)! - 2^n. %H A141690 G. C. Greubel, <a href="/A141690/b141690.txt">Rows n = 0..100 of triangle, flattened</a> %e A141690 Triangle begins %e A141690 1; %e A141690 1, 1; %e A141690 1, 6, 1; %e A141690 1, 19, 19, 1; %e A141690 1, 48, 126, 48, 1; %e A141690 1, 109, 594, 594, 109, 1; %e A141690 1, 234, 2367, 4812, 2367, 234, 1; %e A141690 1, 487, 8565, 31203, 31203, 8565, 487, 1; %e A141690 1, 996, 29188, 176412, 312310, 176412, 29188, 996, 1; %e A141690 1, 2017, 95644, 910300, 2620582, 2620582, 910300, 95644, 2017, 1; %p A141690 A141690 := proc(n,m) %p A141690 2*A008292(n+1,m+1)-binomial(n,m) ; %p A141690 end proc: # _R. J. Mathar_, Jul 12 2012 %t A141690 Table[Table[(2*Sum[(-1)^j Binomial[n + 1, j](k + 1 - j)^n, {j, 0, k + 1}] - Binomial[n - 1, k]), {k, 0, n - 1}], {n, 1, 10}]; Flatten[%] %Y A141690 Cf. A008292, A007318. %K A141690 nonn,tabl %O A141690 0,5 %A A141690 _Roger L. Bagula_, Sep 09 2008