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v[1] = 4 + x; for(n = 1, N, my(i = n + 1); v[i] = ((16*n^4 + 72*n^3 + 108*n^2 + 62*n + 12 + (8*n^3 + 24*n^2 + 26*n + 8)*x - (2*n + 3)*x^2 - x^3)*v[i - 1] + ((8*n^3 + 24*n^2 + 26*n + 8)*x - 4*x^2 - x^3)*deriv(v[i - 1], x) - 2*x^2*deriv(deriv(v[i - 1], x), x))/(8*n^3 + 24*n^2 + 22*n + 6 - 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-ca41bee2bc8fcdbe","steps":["P\u2099 + P\u2099\u208a\u2081"],"edges":["e-91082a28c5d8ee02"],"text":"A035342 \u2192 P\u2099 + P\u2099\u208a\u2081"},"headline":"A035342 \u2192 P\u2099 + P\u2099\u208a\u2081","chain":null}