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v[1] = 1; for(n = 2, N, my(i = n); v[i] = (5 + x)*v[i - 1] + (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-a2b8ff03da0c14a3","steps":["x \u21a6 x+1","x \u21a6 x+1"],"edges":["e-6768e07b6c7820a7","e-a7a24e21d41d72fa"],"text":"A143495 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x+1"},"headline":"A143495 \u2192 x \u21a6 x+1 \u2192 x \u21a6 x+1","chain":null}