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v[1] = 1; v[2] = 1 + x; v[3] = 1 + 2*x + x^2; for(n = 4, N, my(i = n); v[i] = (2 + 5*x + 4*x^2 + x^3)*v[i - 3] - (3 + 6*x + 3*x^2)*v[i - 2] + (3 + 3*x)*v[i - 1]); 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-07e2f0a7469aac14","steps":["Veronese 3 (j=1)","x \u21a6 x+1"],"edges":["e-1e55567759b4d30f","e-66b8121977dbcf00"],"text":"Veronese parent of A098172 \u2192 Veronese 3 (j=1) \u2192 x \u21a6 x+1"},"headline":"Veronese parent of A098172 \u2192 Veronese 3 (j=1) \u2192 x \u21a6 x+1","chain":null}