A221907 - OEIS

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

A221907 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`10`
`2`		`35`
`3`		`140`
`4`		`645`
`5`		`3150`
`6`		`15655`
`7`		`78160`
`8`		`390665`
`9`		`1953170`
`10`		`9765675`
`11`		`48828180`
`12`		`244140685`
`13`		`1220703190`
`14`		`6103515695`
`15`		`30517578200`
`16`		`152587890705`
`17`		`762939453210`
`18`		`3814697265715`
`19`		`19073486328220`
`20`		`95367431640725`
`21`		`476837158203230`

[1,10,35,140,645,3150,15655,78160,390665,1953170, 9765675,48828180,244140685,1220703190,6103515695, 30517578200,152587890705,762939453210, 3814697265715,19073486328220,95367431640725, 476837158203230]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 08:27 EDT 2024. Contains 371769 sequences. (Running on oeis4.)