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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((4*n - 2 + (26*n - 16)*x + (50*n - 36)*x^2 + (38*n - 32)*x^3 + (10*n - 10)*x^4)*v[i - 1] - (2*x + 16*x^2 + 36*x^3 + 32*x^4 + 10*x^5)*deriv(v[i - 1], x))/(n + 2*n*x + n*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-b13531ad79e7c629","steps":["basis A013611","x \u21a6 x/(x+1)"],"edges":["e-52e1bd34b019f2ca","e-095a5ac819e4357e"],"text":"A008459 \u2192 basis A013611 \u2192 x \u21a6 x/(x+1)"},"headline":"A008459 \u2192 basis A013611 \u2192 x \u21a6 x/(x+1)","chain":null}