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v[1] = 1; v[2] = 5 + 2*x; v[3] = 18 + 18*x + 3*x^2; for(n = 3, N, my(i = n + 1); v[i] = (8 + 19*x + 9*x^2 + x^3)*v[i - 3] + (19*x + 18*x^2 + 3*x^3)*deriv(v[i - 3], x) + (9*x^2 + 3*x^3)*deriv(deriv(v[i - 3], x), x) + x^3*deriv(deriv(deriv(v[i - 3], x), x), x) - (12 + 15*x + 3*x^2)*v[i - 2] - (15*x + 6*x^2)*deriv(v[i - 2], x) - 3*x^2*deriv(deriv(v[i - 2], x), x) + (6 + 3*x)*v[i - 1] + 3*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 - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-787407680a56b31c","steps":["reverse","basis A008277"],"edges":["e-03e6ee68811b0a8b","e-ba6433a727aa9661"],"text":"A124932 \u2192 reverse \u2192 basis A008277"},"headline":"A124932 \u2192 reverse \u2192 basis A008277","chain":null}