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v[1] = 1; v[2] = 1 + x; for(n = 2, N, my(i = n + 1); v[i] = ((3*n - 3 + (n - 1)*x - (n - 1)*x^2)*v[i - 2] + ((n - 1)*x - (2*n - 2)*x^2)*deriv(v[i - 2], x) - (n - 1)*x^2*deriv(deriv(v[i - 2], x), x) + (2*n + 1 + (2*n + 1)*x)*v[i - 1] + (2*n + 1)*x*deriv(v[i - 1], x))/(n + 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-de4284a2d5d7d0a6","steps":["basis A008277"],"edges":["e-bf567f7342f815e3"],"text":"A107131 \u2192 basis A008277"},"headline":"A107131 \u2192 basis A008277","chain":null}