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A372991
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a(n) = (2n)!/(a(n-1)*a(n-2)), where a(0)=1, a(1) = 1.
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0
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1, 1, 24, 30, 56, 2160, 3960, 10192, 518400, 1211760, 3872960, 239500800, 668891520, 2517424000, 181062604800, 581935622400, 2497284608000, 203152242585600, 733238884224000, 3511182158848000, 316917498433536000, 1262637358633728000, 6643156644540416000
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OFFSET
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0,3
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LINKS
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FORMULA
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Conjecture D-finite with recurrence a(n) -2*n*(2*n-1)*a(n-3)=0. - R. J. Mathar, Jul 16 2024
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MATHEMATICA
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a[0] = 1; a[1] = 1;
a[n_] := a[n] = (2n)!/(a[n - 1]*a[n - 2]);
Table[a[n], {n, 0, 24}]
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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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