A007869 - OEIS

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

A007869 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`6`
`5`		`18`
`6`		`78`
`7`		`522`
`8`		`6178`
`9`		`137352`
`10`		`6002584`
`11`		`509498932`
`12`		`82545586656`
`13`		`25251015686776`
`14`		`14527077828617744`
`15`		`15713242984902154384`
`16`		`32000507852263779299344`
`17`		`122967932076766466347469888`
`18`		`893788862572805850273939095424`
`19`		`12318904626562502262191503745716384`

[1,1,2,6,18,78,522,6178,137352,6002584,509498932, 82545586656,25251015686776,14527077828617744, 15713242984902154384,32000507852263779299344, 122967932076766466347469888, 893788862572805850273939095424, 12318904626562502262191503745716384]

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 18 09:37 EDT 2024. Contains 375264 sequences. (Running on oeis4.)