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 A193092 #9 Mar 30 2012 18:57:38 %S A193092 1,1,1,1,2,3,1,3,7,13,1,4,12,32,69,1,5,18,58,173,421,1,6,25,92,321, %T A193092 1058,2867,1,7,33,135,523,1977,7159,21477,1,8,42,188,790,3256,13344, %U A193092 53008,175769,1,9,52,252,1134,4986,21996,97956,427401,1567273 %N A193092 Augmentation of the triangular array P given by p(n,k)=k! for 0<=k<=n. See Comments. %C A193092 For an introduction to the unary operation "augmentation" as applied to triangular arrays or sequences of polynomials, see A193091. %C A193092 Regarding W=A193092, we have w(n,n)=A088368. %e A193092 First 7 rows: %e A193092 1 %e A193092 1...1 %e A193092 1...2....3 %e A193092 1...3....7.....13 %e A193092 1...4....12....32....69 %e A193092 1...5....18....58....173...421 %e A193092 1...6....25....92....321...1058...2867 %e A193092 The matrix method described at A193091 shows that row 3 arises from row 2 as the matrix product %e A193092 ............. (1...1...2...4) %e A193092 (1...2...3) * (0...1...1...2) = (1...3...7...13) %e A193092 ............. (0...0...1...1). %e A193092 The equivalent polynomial substitution method: %e A193092 x^2+2x+3 -> (x^3+x^2+2x+4)+2(x^2+x+2)+3(x+1)= x^3+3x^2+7x+13. %t A193092 p[n_, k_] := k! %t A193092 Table[p[n, k], {n, 0, 5}, {k, 0, n}] %t A193092 m[n_] := Table[If[i <= j, p[n + 1 - i, j - i], 0], {i, n}, {j, n + 1}] %t A193092 TableForm[m[4]] %t A193092 w[0, 0] = 1; w[1, 0] = p[1, 0]; w[1, 1] = p[1, 1]; %t A193092 v[0] = w[0, 0]; v[1] = {w[1, 0], w[1, 1]}; %t A193092 v[n_] := v[n - 1].m[n] %t A193092 TableForm[Table[v[n], {n, 0, 6}]] (* A193092 *) %t A193092 Flatten[Table[v[n], {n, 0, 8}]] %Y A193092 Cf. A088368, A193091. %K A193092 nonn,tabl %O A193092 0,5 %A A193092 _Clark Kimberling_, Jul 30 2011