A127642 - OEIS

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

A127642 as a simple table

`n`		`a(n)`
`1`		`-1`
`2`		`0`
`3`		`1`
`4`		`6`
`5`		`19`
`6`		`53`
`7`		`144`
`8`		`384`
`9`		`1010`
`10`		`2652`
`11`		`6960`
`12`		`18271`
`13`		`48007`
`14`		`126292`
`15`		`332679`
`16`		`877561`
`17`		`2318039`
`18`		`6131032`
`19`		`16236271`
`20`		`43047375`
`21`		`114256746`
`22`		`303570609`
`23`		`807327311`
`24`		`2148933010`
`25`		`5724699937`
`26`		`15262109996`
`27`		`40717942427`
`28`		`108704057535`
`29`		`290385838171`
`30`		`776171229484`

[-1,0,1,6,19,53,144,384,1010,2652,6960,18271, 48007,126292,332679,877561,2318039,6131032, 16236271,43047375,114256746,303570609,807327311, 2148933010,5724699937,15262109996,40717942427, 108704057535,290385838171,776171229484]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)