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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((29*n - 11 + (173*n - 83)*x + (327*n - 201)*x^2 + (251*n - 197)*x^3 + (68*n - 68)*x^4)*v[i - 1] - (5 + 52*x + 194*x^2 + 320*x^3 + 241*x^4 + 68*x^5)*deriv(v[i - 1], x))/(6*n + 12*n*x + 6*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-79ebafb266da3b41","steps":["basis A013610","x \u21a6 x/(x+1)"],"edges":["e-01dc3c5cce6c6f01","e-7fe91912cc740cf0"],"text":"A172431 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)"},"headline":"A172431 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)","chain":null}