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     12;\n   3:      25,      120,       144;\n   4:     125,      900,      2160,       1728;\n   5:     625,     6000,     21600,      34560,      20736;\n   6:    3125,    37500,    180000,     432000,     518400,      248832;\n   7:   15625,   225000,   1350000,    4320000,    7776000,     7464960,     2985984;\n   8:   78125,  1312500,   9450000,   37800000,   90720000,   130636800,   104509440,    35831808;\n   9:  390625,  7500000,  63000000,  302400000,  907200000,  1741824000,  2090188800,  1433272320,   429981696;\n  10: 1953125, 42187500, 405000000, 2268000000, 8164800000, 19595520000, 31352832000, 32248627200, 19349176320, 5159780352;\n","recurrence_sentence":"The row polynomials satisfy P(n,x) = (5+12*x)*P(n-1,x) for n >= 2, with P(1,x) = 1.","mathematica":"P[1, x_] := 1;\nP[n_, x_] := P[n, x] = Expand[(5 + 12*x)*P[n - 1, x]];\nTable[CoefficientList[P[n, x], x], {n, 1, 10}] // Flatten","pari":"P(N) = {my(v = vector(N)); v[1] = 1; for(n = 2, N, my(i = n); v[i] = (5 + 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