A032081 - OEIS

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

A032081 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`4`
`5`		`20`
`6`		`220`
`7`		`2020`
`8`		`26310`
`9`		`332410`
`10`		`5189380`
`11`		`83623310`
`12`		`1551800020`
`13`		`30389755640`
`14`		`659473386920`
`15`		`15190156196820`
`16`		`379169061066320`
`17`		`10036224774532890`
`18`		`283940562045261940`
`19`		`8488369128461080030`

[1,1,1,4,20,220,2020,26310,332410,5189380, 83623310,1551800020,30389755640,659473386920, 15190156196820,379169061066320,10036224774532890, 283940562045261940,8488369128461080030]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 14:54 EDT 2024. Contains 371960 sequences. (Running on oeis4.)