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 A193604 #5 Mar 30 2012 18:57:38 %S A193604 1,2,1,8,8,3,64,88,62,19,1024,1664,1568,896,233,32768,58368,64128, %T A193604 49248,23890,5385,2097152,3932160,4703232,4249728,2800488,1179656, %U A193604 233787,268435456,517996544,649887744,645547008,507802304,293645688,108978862 %N A193604 Augmentation of the triangle A055248. See Comments. %C A193604 For an introduction to the unary operation "augmentation" as applied to triangular arrays or sequences of polynomials, see A193091. %e A193604 First five rows of A193604: %e A193604 1 %e A193604 2.....1 %e A193604 8.....8.....3 %e A193604 64....88....62....19 %e A193604 1024..1664..1568..896...233 %t A193604 u[n_, k_] := Sum[Binomial[n, h], {h, 0, k}] (* A055248 *) %t A193604 p[n_, k_] := u[n, n - k] %t A193604 Table[p[n, k], {n, 0, 5}, {k, 0, n}] %t A193604 m[n_] := Table[If[i <= j, p[n + 1 - i, j - i], 0], {i, n}, {j, n + 1}] %t A193604 TableForm[m[4]] %t A193604 w[0, 0] = 1; w[1, 0] = p[1, 0]; w[1, 1] = p[1, 1]; %t A193604 v[0] = w[0, 0]; v[1] = {w[1, 0], w[1, 1]}; %t A193604 v[n_] := v[n - 1].m[n] %t A193604 TableForm[Table[v[n], {n, 0, 6}]] (* A193604 *) %t A193604 Flatten[Table[v[n], {n, 0, 8}]] %Y A193604 Cf. A055248, A193091. %K A193604 nonn,tabl %O A193604 0,2 %A A193604 _Clark Kimberling_, Jul 31 2011