A129923 a(n) = (n+5)! / 5.
24, 144, 1008, 8064, 72576, 725760, 7983360, 95800320, 1245404160, 17435658240, 261534873600, 4184557977600, 71137485619200, 1280474741145600, 24329020081766400, 486580401635328000, 10218188434341888000
Offset: 0
Links
- G. C. Greubel, Table of n, a(n) for n = 0..440
Programs
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Magma
[Factorial(n+5)/5: n in [0..30]]; // G. C. Greubel, Sep 28 2024
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Mathematica
Table[(n+5)!/5, {n, 0, 5 + 25}] Range[5,30]!/5 (* Harvey P. Dale, Mar 29 2023 *) -
PARI
a(n)=(n+5)!/5;
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SageMath
[factorial(n+5)//5 for n in range(31)] # G. C. Greubel, Sep 28 2024
Formula
E.g.f.: 24/(1 - x)^6. - G. C. Greubel, Sep 28 2024
Extensions
Edited by Ralf Stephan, Nov 10 2013