A026631 - OEIS

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

A026631 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`7`
`4`		`30`
`5`		`119`
`6`		`467`
`7`		`1820`
`8`		`7076`
`9`		`27493`
`10`		`106848`
`11`		`415538`
`12`		`1617504`
`13`		`6302416`
`14`		`24581249`
`15`		`95968478`
`16`		`375029576`
`17`		`1466881997`
`18`		`5742440324`
`19`		`22498218218`
`20`		`88212326756`
`21`		`346114729562`
`22`		`1358944775654`
`23`		`5338963361408`
`24`		`20987909276600`

[1,7,30,119,467,1820,7076,27493,106848,415538, 1617504,6302416,24581249,95968478,375029576, 1466881997,5742440324,22498218218,88212326756, 346114729562,1358944775654,5338963361408, 20987909276600]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)