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v[1] = 1; for(n = 2, N, my(i = n); v[i] = ((8*n^2 - 2 + (14*n^2 + 28*n - 12)*x - (8*n^2 - 83*n + 24)*x^2 - (26*n^2 - 82*n + 20)*x^3 - (12*n^2 - 27*n + 6)*x^4)*v[i - 1] + ((16*n - 4)*x + (60*n - 15)*x^2 + (84*n - 21)*x^3 + (52*n - 13)*x^4 + (12*n - 3)*x^5)*deriv(v[i - 1], x))/(2*n^2 + n + (4*n^2 + 2*n)*x + (2*n^2 + n)*x^2)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i, v[i])))};\nT(10)","reading":{"first_row":1,"offset":1,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-a7d7f0f34831fe03","steps":["x \u21a6 x/(x+1)"],"edges":["e-2169e16faf1b3c03"],"text":"A281000 \u2192 x \u21a6 x/(x+1)"},"headline":"A281000 \u2192 x \u21a6 x/(x+1)","chain":null}