A178711 - OEIS

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

A178711 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`3`
`3`		`20`
`4`		`109`
`5`		`555`
`6`		`2787`
`7`		`13947`
`8`		`69750`
`9`		`348767`
`10`		`1743856`
`11`		`8719302`
`12`		`43596534`
`13`		`217982694`
`14`		`1089913497`
`15`		`5449567514`
`16`		`27247837603`
`17`		`136239188049`
`18`		`681195940281`
`19`		`3405979701441`
`20`		`17029898507244`
`21`		`85149492536261`
`22`		`425747462681350`
`23`		`2128737313406796`
`24`		`10643686567034028`
`25`		`53218432835170188`

[0,3,20,109,555,2787,13947,69750,348767,1743856, 8719302,43596534,217982694,1089913497,5449567514, 27247837603,136239188049,681195940281, 3405979701441,17029898507244,85149492536261, 425747462681350,2128737313406796, 10643686567034028,53218432835170188]

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 13 00:40 EDT 2024. Contains 375857 sequences. (Running on oeis4.)