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v[1] = 1; for(n = 2, N, my(i = n); v[i] = (1 + (18*n - 30)*x)*v[i - 1] + (3*x - 9*x^2)*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}},{"oeis_id":"A290316","target":"triangle","first_row":1,"oeis_offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":true,"rows_shown":10,"polytool_commit":"c48629374597092cc41ef4d6273f37991516f984","triangle_example":"Triangle begins:\n  0: 1;\n  1: 1,       6;\n  2: 1,      48,        90;\n  3: 1,     234,      2214,         2160;\n  4: 1,     996,     27432,       114588,         71280;\n  5: 1,    4062,    260748,      2791800,       6770628,        2993760;\n  6: 1,   16344,   2178630,     48256344,     280652364,      454137840,       152681760;\n  7: 1,   65490,  16966530,    691711920,    7846782660,    29157089832,     34236464400,      9160905600;\n  8: 1,  262092, 126820980,   8851303620,  174637926180,  1219804572672,   3187159638984,   2871984146400,    632102486400;\n  9: 1, 1048518, 924701832, 105253405560, 3359003385600, 39425596747272, 188635513271256, 369150976563264, 265665182896800, 49303993939200;\n","recurrence_sentence":"The row polynomials satisfy P(n,x) = (1+(18*n-12)*x)*P(n-1,x) + (3*x-9*x^2)*d/dx P(n-1,x) for n >= 1, with P(0,x) = 1.","mathematica":"P[0, x_] := 1;\nP[n_, x_] := P[n, x] = Expand[(1 + (18*n - 12)*x)*P[n - 1, x] + (3*x - 9*x^2)*D[P[n - 1, x], x]];\nTable[PadRight[CoefficientList[P[n, x], x], n + 1], {n, 0, 9}] // Flatten","pari":"P(N) = {my(v = vector(N + 1)); 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