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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((2*n + 1 + (6*n + 2)*x + (4*n + 1)*x^2)*v[i - 1])/(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-7fd16a32c438d522","steps":["basis A013609","x \u21a6 x/(x+1)"],"edges":["e-23e30432bbaed1be","e-d7d8897b2a5f80a5"],"text":"A059364 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)"},"headline":"A059364 \u2192 basis A013609 \u2192 x \u21a6 x/(x+1)","chain":null}