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v[1] = 14 + 42*x + 30*x^2; for(n = 1, N, my(i = n + 1); v[i] = ((14*n^2 + 93*n + 154 + (46*n^2 + 309*n + 518)*x + (50*n^2 + 339*n + 574)*x^2 + (18*n^2 + 123*n + 210)*x^3)*v[i - 1] + (n + 2 + (12*n + 36)*x + (30*n + 96)*x^2 + (28*n + 92)*x^3 + (9*n + 30)*x^4)*deriv(v[i - 1], x))/(4*n^2 + 30*n + 56 + (8*n^2 + 60*n + 112)*x + (4*n^2 + 30*n + 56)*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-91d76a88748fc9ba","steps":["x \u21a6 x/(x+1)"],"edges":["e-87cea5e82f8c5aeb"],"text":"A286785 \u2192 x \u21a6 x/(x+1)"},"headline":"A286785 \u2192 x \u21a6 x/(x+1)","chain":null}