A006845 - OEIS

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A006845 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`1`
`3`		`3`
`4`		`3`
`5`		`140`
`6`		`420`
`7`		`840`
`8`		`840`
`9`		`1081800`
`10`		`75675600`
`11`		`454053600`
`12`		`2270268000`
`13`		`9081072000`
`14`		`27243216000`
`15`		`54486432000`
`16`		`54486432000`
`17`		`52401161274029568000`
`18`		`786017419110443520000`

[0,1,3,3,140,420,840,840,1081800,75675600, 454053600,2270268000,9081072000,27243216000, 54486432000,54486432000,52401161274029568000, 786017419110443520000]

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Last modified June 19 19:03 EDT 2013. Contains 226416 sequences.