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v[1] = 1; v[2] = 2 + x; for(n = 3, N, my(i = n); v[i] = -(n - 2 + (3*n - 6)*x + (n - 2)*x^2)*v[i - 2] - ((3*n - 6)*x + (2*n - 4)*x^2)*deriv(v[i - 2], x) - (n - 2)*x^2*deriv(deriv(v[i - 2], x), x) + (n + (n - 1)*x)*v[i - 1] + (n - 1)*x*deriv(v[i - 1], x)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i, v[i])))};\nT(10)","reading":{"first_row":1,"offset":1,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-c9dce8c25621fdea","steps":["basis A008277"],"edges":["e-3d7ab7bd147ddfc0"],"text":"A046716 \u2192 basis A008277"},"headline":"A046716 \u2192 basis A008277","chain":null}