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v[1] = 1; v[2] = -6 + x; for(n = 2, N, my(i = n + 1); v[i] = -(7 - x)*v[i - 1] - (7 - 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-21854f4257effb01","steps":["x \u21a6 x\u22127"],"edges":["e-742e5241e9a4e627"],"text":"A030528 \u2192 x \u21a6 x\u22127"},"headline":"A030528 \u2192 x \u21a6 x\u22127","chain":null}
