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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((11*n - 2 + (46*n - 16)*x + (71*n - 38)*x^2 + (48*n - 36)*x^3 + (12*n - 12)*x^4)*v[i - 1] - (4 + 26*x + 66*x^2 + 82*x^3 + 50*x^4 + 12*x^5)*deriv(v[i - 1], x))/(n + 2 + (2*n + 4)*x + (n + 2)*x^2)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-57b4b14604f4c0d7","steps":["basis A007318","x \u21a6 x/(x+1)"],"edges":["e-3c8d43f1dfa996d6","e-7c028319f40d166a"],"text":"A126216 \u2192 basis A007318 \u2192 x \u21a6 x/(x+1)"},"headline":"A126216 \u2192 basis A007318 \u2192 x \u21a6 x/(x+1)","chain":null}