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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = ((125*n^2 - 396*n + 289 + (900*n^2 - 2958*n + 2157)*x + (2706*n^2 - 8967*n + 6450)*x^2 + (4324*n^2 - 14181*n + 10010)*x^3 + (3861*n^2 - 12381*n + 8565)*x^4 + (1824*n^2 - 5673*n + 3849)*x^5 + (356*n^2 - 1068*n + 712)*x^6)*v[i - 1] - (100*n - 230 + (1060*n - 2417)*x + (4485*n - 10059)*x^2 + (10052*n - 22090)*x^3 + (13058*n - 28060)*x^4 + (9912*n - 20805)*x^5 + (4093*n - 8387)*x^6 + (712*n - 1424)*x^7)*deriv(v[i - 1], x) + (20 + 280*x + 1589*x^2 + 4801*x^3 + 8570*x^4 + 9370*x^5 + 6185*x^6 + 2269*x^7 + 356*x^8)*deriv(deriv(v[i - 1], x), x))/(9*n + 27*n*x + 27*n*x^2 + 9*n*x^3)); 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-ed9434bfd889c409","steps":["basis A013610","x \u21a6 x/(x+1)"],"edges":["e-14634eb9644b375c","e-3bcc2123eeb5b861"],"text":"A081579 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)"},"headline":"A081579 \u2192 basis A013610 \u2192 x \u21a6 x/(x+1)","chain":null}