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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((23*n + 4 + (143*n - 8)*x + (273*n - 84)*x^2 + (209*n - 128)*x^3 + (56*n - 56)*x^4)*v[i - 1] - (2 + 28*x + 128*x^2 + 236*x^3 + 190*x^4 + 56*x^5)*deriv(v[i - 1], x))/(3*n + 6 + (6*n + 12)*x + (3*n + 6)*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-8ce61d302cec295b","steps":["basis A013610","x \u21a6 x/(x+1)"],"edges":["e-72b4d9a78d1bd227","e-e611753caf821f7c"],"text":"A114687 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)"},"headline":"A114687 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)","chain":null}