A020865 - OEIS

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

A020865 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`4`
`2`		`38`
`3`		`328`
`4`		`2686`
`5`		`21224`
`6`		`163982`
`7`		`1249784`
`8`		`9447102`
`9`		`71056840`
`10`		`532854638`
`11`		`3988597144`
`12`		`29822927134`
`13`		`222836912744`
`14`		`1664351910350`
`15`		`12427793513528`
`16`		`92784673372542`
`17`		`692656225953544`
`18`		`5170521713987630`
`19`		`38595421782328024`
`20`		`288089831076277726`
`21`		`2150375933904641960`

[0,4,38,328,2686,21224,163982,1249784,9447102, 71056840,532854638,3988597144,29822927134, 222836912744,1664351910350,12427793513528, 92784673372542,692656225953544,5170521713987630, 38595421782328024,288089831076277726, 2150375933904641960]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)