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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (-(27*n^3 - 153*n^2 + 138*n + 84 - (135*n^2 - 207*n - 360)*x + (108*n + 378)*x^2 + 162*x^3)*v[i - 1] + (18*n^2 - 30*n - 16 + (54*n^2 - 126*n - 108)*x - (108*n + 216)*x^2 - 108*x^3)*deriv(v[i - 1], x))/(27*n^2 - 45*n - 6 - (54*n + 36)*x - 54*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-f6268da8d9636534","steps":["basis A013610","D+1"],"edges":["e-a15a4571c9a83032","e-8299fa4530478894"],"text":"A122848 \u2192 basis A013610 \u2192 D+1"},"headline":"A122848 \u2192 basis A013610 \u2192 D+1","chain":null}