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A091037
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Second column (k=5) of array A090214 ((4,4)-Stirling2) divided by 4*4!=96.
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1
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1, 144, 17856, 2156544, 259117056, 31102009344, 3732432224256, 447896453382144, 53747684481171456, 6449724779548114944, 773967036949154758656, 92876045955579714207744
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OFFSET
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2,2
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LINKS
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FORMULA
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a(n)=A090214(n, 5)/(4*4!)= (4!^(n-2))*(5^(n-1)-1)/4, n>=2.
G.f.: (x^2)/((1-5!*x)*(1-4!*x))= (x/(4*4!))*(1/(1-5!*x) - 1/(1-4!*x)).
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CROSSREFS
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Cf. A091038 (second column of (5, 5)-Stirling2 array divided by 600).
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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