A210281 (8n)!/8^n.
1, 5040, 326918592000, 1211813284635233280000, 64240926985765022013480960000000, 24899758399899222849902687670779904000000000, 47355329866546908076714664639943599847875543040000000000
Offset: 0
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..50
Crossrefs
Programs
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Magma
[Factorial(8*n)/8^n: n in [0..10]]; // Vincenzo Librandi, Feb 15 2013
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Mathematica
Table[(8 n)!/8^n, {n, 0, 10}] (* Vincenzo Librandi, Feb 15 2013 *)
Formula
E.g.f.: 1/(1-x^8/8).