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A137381
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Triangle: p(x) = (t/log(1 + t))^a0*(1 + t)^x; a0=2; weights (n+1)!*n!.
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0
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1, 2, 2, 1, 6, 6, 0, -12, 0, 24, -12, 120, 0, -240, 120, 360, -2280, 0, 4800, -3600, 720, -13260, 68040, 0, -151200, 138600, -45360, 5040, 638400, -2899680, 0, 6773760, -7056000, 2963520, -564480, 40320, -39630528, 166320000, 0, -406425600, 464002560, -228614400, 57576960, -7257600, 362880
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OFFSET
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1,2
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COMMENTS
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p(n,x,alpha) = sum(i=0..n, (sum(k=1..i, binomial(k+alpha-1,alpha-1) *sum(j=0..k, ((-1)^j*j!*stirling1(j+i,j) *binomial(k,j))/(j+i)!))) *binomial(x,n-i)). - Vladimir Kruchinin, Jan 12 2012
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LINKS
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FORMULA
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p(x) = (t/Log[1 + t])^a0*(1 + t)^x; a0=2;weights (n+1)!*n!;
T(n,r) = n!*(n+1)!*sum(i=0..n,((sum(k=1..i, (k+1)*sum(j=0..k,((-1)^j*j! * stirling1(j+i,j)* C(k,j))/(j+i)!) ))*stirling1(n-i,k))/(n-i)!). - Vladimir Kruchinin, Jan 12 2012
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EXAMPLE
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{1},
{2, 2},
{1, 6, 6},
{0, -12, 0, 24},
{-12, 120, 0, -240, 120},
{360, -2280, 0, 4800, -3600, 720},
{-13260, 68040, 0, -151200, 138600, -45360, 5040},
{638400, -2899680, 0, 6773760, -7056000, 2963520, -564480, 40320}
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MATHEMATICA
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a0 = 2;
p[t_] = (t/Log[1 + t])^a0*(1 + t)^x;
Table[ ExpandAll[(n!*(n + 1)!)*SeriesCoefficient[ Series[p[t], {t, 0, 30}], n]], {n, 0, 10}];
a = Table[ CoefficientList[(n!*(n + 1)!)*SeriesCoefficient[ Series[p[t], {t, 0, 30}], n], x], {n, 0, 10}];
Flatten[a]
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PROG
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(Maxima) T(n, r):=n!*(n+1)!*sum(((sum((k+1)*sum(((-1)^j*j!*stirling1(j+i, j)* binomial(k, j))/(j+i)!, j, 0, k) , k, 1, i))*stirling1(n-i, k))/(n-i)!, i, 0, n); /* Vladimir Kruchinin, Jan 12 2012 */
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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