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A295475
a(n) = (20*n)!*(3*n)!/((10*n)!*(9*n)!*(4*n)!).
2
1, 461890, 935387159850, 2182519096151533552, 5398397695681095146608490, 13787702861800799166026014363140, 35936545440404705429404600374145350960, 94988519542968717273112119046397042704228800, 253668511451664737174164792111754605640400674756970
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..8.
FORMULA
G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/9, 2/9, 4/9, 1/2, 5/9, 7/9, 8/9], 40960000000000/14348907*x).
MATHEMATICA
Table[((20n)!(3n)!)/((10n)!(9n)!(4n)!), {n, 0, 20}] (*
Harvey P. Dale
, Mar 26 2022 *)
CROSSREFS
Cf.
A295431
.
Sequence in context:
A202600
A114671
A270856
*
A205765
A216068
A237964
Adjacent sequences:
A295472
A295473
A295474
*
A295476
A295477
A295478
KEYWORD
nonn
AUTHOR
Gheorghe Coserea
, Nov 28 2017
STATUS
approved
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Last modified July 22 18:23 EDT 2024. Contains 374540 sequences. (Running on oeis4.)