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v[1] = 1; v[2] = 1; for(n = 2, N, my(i = n + 1); v[i] = v[i - 1] + ((1/3)*n^3 + (3/2)*n^2 + (13/6)*n + 1)*x*v[i - 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-a3274460eb3b9452","steps":["\u03b3"],"edges":["e-92fa46b1f7f7427e"],"text":"A154228 \u2192 \u03b3"},"headline":"A154228 \u2192 \u03b3","chain":null}