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 A137663 Triangular sequence of coefficients from a polynomial recursion: p(x,n)=-2 (-(n - 1) + x)*p(x, n - 1) + (-(n + 1) + (n + 2)* x - x^2)p(x, n - 2). 0
 1, 0, -2, -3, 0, 3, -12, 14, 2, -4, -57, 90, -28, -10, 5, -384, 666, -306, 0, 30, -6, -3441, 6342, -3419, 368, 213, -70, 7, -38220, 74202, -44886, 7834, 1886, -948, 140, -8, -504111, 1023780, -679176, 155604, 15918, -14652, 2880, -252, 9, -7683576, 16226262, -11611074, 3201728, 55680, -243876, 61670 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row sums are: {1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0} LINKS FORMULA p(x,n)=-2 (-(n - 1) + x)*p[x, n - 1] + (-(n + 1) + (n + 2)* x - x^2)p[x, n - 2]; out_n,m=Coefficients(p(x,n) EXAMPLE {1}, {0, -2}, {-3,0, 3}, {-12, 14, 2, -4}, {-57, 90, -28, -10, 5}, {-384, 666, -306, 0,30, -6}, {-3441, 6342, -3419,368, 213, -70, 7}, {-38220, 74202, -44886, 7834, 1886, -948, 140, -8}, {-504111, 1023780, -679176, 155604, 15918, -14652, 2880, -252, 9}, {-7683576, 16226262, -11611074, 3201728, 55680, -243876, 61670, -7224, 420, -10}, {-132759147, 290128956, -221191449, 69967716, -3029890, -4304544, 1374390, -201388, 16005, -660, 11} MATHEMATICA Clear[p, x] p[x, 0] = 1; p[x, -1] = 0; p[x_, n_] := p[x, n] = -2 (-(n - 1) + x)*p[x, n - 1] + (-(n + 1) + (n + 2)* x - x^2)p[x, n - 2]; g = Table[ExpandAll[p[x, n]], {n, 0, 10}]; a = Table[ CoefficientList[p[x, n], x], {n, 0, 10}]; Flatten[a] CROSSREFS Sequence in context: A216217 A253283 A261719 * A257740 A161628 A244119 Adjacent sequences:  A137660 A137661 A137662 * A137664 A137665 A137666 KEYWORD tabl,sign AUTHOR Roger L. Bagula, Apr 27 2008 STATUS approved

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Last modified September 21 23:10 EDT 2020. Contains 337274 sequences. (Running on oeis4.)