A007227 - OEIS

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A007227 as a simple table

`n`		`a(n)`
`2`		`9`
`3`		`42`
`4`		`236`
`5`		`1287`
`6`		`7314`
`7`		`41990`
`8`		`245256`
`9`		`1448655`
`10`		`8649823`
`11`		`52106040`
`12`		`316360752`
`13`		`1933910820`
`14`		`11893566078`
`15`		`73537906926`
`16`		`456864894288`
`17`		`2850557192175`
`18`		`17854854154215`
`19`		`112230508880490`
`20`		`707714010205020`
`21`		`4475876883386895`

[9,42,236,1287,7314,41990,245256,1448655,8649823, 52106040,316360752,1933910820,11893566078, 73537906926,456864894288,2850557192175, 17854854154215,112230508880490,707714010205020, 4475876883386895]

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Last modified May 22 17:33 EDT 2013. Contains 225559 sequences.