A026992 - OEIS

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A026992 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`15`
`4`		`72`
`5`		`385`
`6`		`1740`
`7`		`7200`
`8`		`33892`
`9`		`174369`
`10`		`806288`
`11`		`3477513`
`12`		`16493280`
`13`		`84033826`
`14`		`393038584`
`15`		`1732173866`
`16`		`8260858904`
`17`		`41899043017`
`18`		`197360311690`
`19`		`881681864213`
`20`		`4220575766976`
`21`		`21345258947469`
`22`		`101030588041560`
`23`		`455632655173002`
`24`		`2186903113868104`
`25`		`11036726477564350`
`26`		`52421656397330054`

[1,4,15,72,385,1740,7200,33892,174369,806288, 3477513,16493280,84033826,393038584,1732173866, 8260858904,41899043017,197360311690,881681864213, 4220575766976,21345258947469,101030588041560, 455632655173002,2186903113868104, 11036726477564350,52421656397330054]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)