A002057 - OEIS

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A002057 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`14`
`3`		`48`
`4`		`165`
`5`		`572`
`6`		`2002`
`7`		`7072`
`8`		`25194`
`9`		`90440`
`10`		`326876`
`11`		`1188640`
`12`		`4345965`
`13`		`15967980`
`14`		`58929450`
`15`		`218349120`
`16`		`811985790`
`17`		`3029594040`
`18`		`11338026180`
`19`		`42550029600`
`20`		`160094486370`
`21`		`603784920024`
`22`		`2282138106804`
`23`		`8643460269248`

[1,4,14,48,165,572,2002,7072,25194,90440,326876, 1188640,4345965,15967980,58929450,218349120, 811985790,3029594040,11338026180,42550029600, 160094486370,603784920024,2282138106804, 8643460269248]

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Last modified May 20 01:43 EDT 2013. Contains 225445 sequences.