A226990 - OEIS

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A226990 as a simple table

`n`		`a(n)`
`1`		`21`
`2`		`313`
`3`		`2820`
`4`		`24158`
`5`		`180712`
`6`		`1187869`
`7`		`6897735`
`8`		`35818171`
`9`		`168412446`
`10`		`725322952`
`11`		`2890248513`
`12`		`10747422169`
`13`		`37565694126`
`14`		`124186120157`
`15`		`390330632256`
`16`		`1171738349385`
`17`		`3372578086357`
`18`		`9339039810942`
`19`		`24954235842112`
`20`		`64510189847669`

[21,313,2820,24158,180712,1187869,6897735, 35818171,168412446,725322952,2890248513, 10747422169,37565694126,124186120157,390330632256, 1171738349385,3372578086357,9339039810942, 24954235842112,64510189847669]

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Last modified April 19 16:52 EDT 2024. Contains 371794 sequences. (Running on oeis4.)