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v[1] = 1; for(n = 2, N, my(i = n); v[i] = (2 + x)*v[i - 1] + (4 + 2*x)*deriv(v[i - 1], x)); 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-806f02861480e04e","steps":["x \u21a6 x+1"],"edges":["e-4693d9d14965ecb4"],"text":"A154602 \u2192 x \u21a6 x+1"},"headline":"A154602 \u2192 x \u21a6 x+1","chain":null}