A181688 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A181688 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`4`
`4`		`8`
`5`		`23`
`6`		`55`
`7`		`144`
`8`		`360`
`9`		`921`
`10`		`2329`
`11`		`5924`
`12`		`15024`
`13`		`38159`
`14`		`96847`
`15`		`245888`
`16`		`624176`
`17`		`1584593`
`18`		`4022609`
`19`		`10211940`
`20`		`25924088`
`21`		`65811431`
`22`		`167069767`
`23`		`424126160`
`24`		`1076693080`
`25`		`2733310377`
`26`		`6938824361`
`27`		`17615009476`
`28`		`44717740000`
`29`		`113521160607`
`30`		`288186606623`

[1,1,4,8,23,55,144,360,921,2329,5924,15024,38159, 96847,245888,624176,1584593,4022609,10211940, 25924088,65811431,167069767,424126160,1076693080, 2733310377,6938824361,17615009476,44717740000, 113521160607,288186606623]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)