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A304396
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a(n) = A304394(n) / (n+1)^4.
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1
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1, 7, 941, 597571, 1077304324, 4250548204220, 31362344061243731, 389533784331698799757, 7553909607396308839307729, 216153962578005976317428630031, 8734715288242477329577387114158361, 481264969283514820342197141086713669943, 35132745658635258962977017094392007388046256, 3317919567828983194629673950155604531470409170896
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = (n+1)^(4*n)/(n+1)! - Sum_{k=1..n} (n+1)^(4*k-4)/k! * (n-k+1)^4 * a(n-k) for n>0 with a(0)=1.
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PROG
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(PARI) /* A304394 formula: [x^n] exp( n^4*x ) * (1 - x*A(x)) = 0 */
{A304394(n) = my(A=[1]); for(i=0, n, A=concat(A, 0); m=#A; A[m] = Vec( exp(x*m^4 +x^2*O(x^m)) * (1 - x*Ser(A)) )[m+1] ); A[n+1]}
for(n=0, 25, print1( A304394(n)/(n+1)^4, ", "))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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