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0, 3, 16, 90, 576, 4200, 34560, 317520, 3225600, 35925120, 435456000, 5708102400, 80472268800, 1214269056000, 19527937228800, 333456963840000, 6025763487744000, 114887039275008000, 2304854534062080000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..300
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MATHEMATICA
| a[n_]:=(n+2)!-(n+1)!-n!; [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 05 2008]
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PROG
| (MAGMA) [n*(n+2)*Factorial(n): n in [0..25]]; // Vincenzo Librandi, Aug 11 2011
(PARI) a(n)=n!*(n*(n+2)) \\ Charles R Greathouse IV, Aug 11 2011
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CROSSREFS
| Sequence in context: A026330 A146963 A074562 * A009124 A067679 A099952
Adjacent sequences: A130741 A130742 A130743 * A130745 A130746 A130747
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KEYWORD
| nonn,easy
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jul 12 2007
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EXTENSIONS
| More terms and Mathematica program from Orlovsky (4vladimir(AT)gmail.com), Dec 05 2008
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