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 A091063 #3 Mar 30 2012 18:36:39 %S A091063 1,1,0,1,1,0,1,2,2,0,1,3,5,7,0,1,4,9,18,34,0,1,5,14,34,86,206,0,1,6, %T A091063 20,56,162,508,1476,0,1,7,27,85,269,939,3549,12123,0,1,8,35,122,415, %U A091063 1540,6413,28498,111866,0,1,9,44,168,609,2361,10314,50382,257922,1143554,0,1 %N A091063 Triangle, read by rows, such that the initial terms of the binomial transform of the n-th row forms the n-th row of triangle A059438 transposed (permutations of [1..n] with k components). %C A091063 The main diagonal equals A075834 shift 1 place left; subsequent diagonals of this triangle are self-convolutions of the main diagonal. A075834 has the property that the n-th term of the n-th self-convolution of A075834 equals n!. The first (n+1) terms of the binomial transform of the n-th row forms the n-th row of triangle A059438 transposed, which has row sums equal to the factorials. A059438 is also formed from the self-convolutions of its main diagonal (A003319). %e A091063 Rows begin: %e A091063 {1}, %e A091063 {1,0}, %e A091063 {1,1,0}, %e A091063 {1,2,2,0}, %e A091063 {1,3,5,7,0}, %e A091063 {1,4,9,18,34,0}, %e A091063 {1,5,14,34,86,206,0}, %e A091063 {1,6,20,56,162,508,1476,0}, %e A091063 {1,7,27,85,269,939,3549,12123,0},... %e A091063 Initial terms of the binomial transform of each row forms A059438: %e A091063 {1}, %e A091063 {1,1}, %e A091063 {1,2,3}, %e A091063 {1,3,7,13}, %e A091063 {1,4,12,32,71}, %e A091063 {1,5,18,58,177,461}, %e A091063 {1,6,25,92,327,1142,3447}, %e A091063 {1,7,33,135,531,2109,8411,29093}, %e A091063 {1,8,42,188,800,3440,15366,69692,273343},... %e A091063 which has row sums equal to the factorials. %Y A091063 Cf. A075834, A059438, A003319. %K A091063 nonn,tabl %O A091063 0,8 %A A091063 _Paul D. Hanna_, Dec 17 2003