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v[1] = 1; v[2] = 1; for(n = 2, N, my(i = n + 1); v[i] = (-(3*n - 6 + (4*n^2 - 22*n + 34)*x + (4*n^3 - 32*n^2 + 90*n - 96)*x^2 + (12*n^2 - 64*n + 84)*x^3 + (8*n - 16)*x^4)*v[i - 2] - ((2*n - 4)*x + (4*n^2 - 22*n + 32)*x^2 - (4*n^2 - 32*n + 60)*x^3 - (12*n - 40)*x^4 - 8*x^5)*deriv(v[i - 2], x) + (4*n - 11 + (4*n^2 - 22*n + 38)*x + (10*n - 28)*x^2 + 4*x^3)*v[i - 1] + ((2*n - 6)*x - (2*n - 10)*x^2 - 4*x^3)*deriv(v[i - 1], x))/(n - 3 + 2*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-54b58a0ddb0e34fe","steps":["D+1"],"edges":["e-909f660740cd6871"],"text":"A185410 \u2192 D+1"},"headline":"A185410 \u2192 D+1","chain":null}