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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (-(5*n - 11 + (28*n - 48)*x + (56*n - 78)*x^2 + (48*n - 56)*x^3 + (15*n - 15)*x^4)*v[i - 1] + (8 + 46*x + 105*x^2 + 119*x^3 + 67*x^4 + 15*x^5)*deriv(v[i - 1], x))/(n + 2*n*x + n*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-c2b7c74f8491f01b","steps":["basis A013609","x \u21a6 x/(x+1)"],"edges":["e-63a398c0ccd31fef","e-1a3f3b14607279ac"],"text":"A207824 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)"},"headline":"A207824 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)","chain":null}