A221821 - OEIS

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A221821 as a simple table

`n`		`a(n)`
`1`		`3`
`2`		`31`
`3`		`252`
`4`		`2113`
`5`		`17684`
`6`		`147920`
`7`		`1237439`
`8`		`10351593`
`9`		`86594795`
`10`		`724396370`
`11`		`6059833949`
`12`		`50692672540`
`13`		`424062286786`
`14`		`3547432284249`
`15`		`29675536361423`
`16`		`248246446379403`
`17`		`2076670068892280`
`18`		`17372085836189001`
`19`		`145323694322280832`

[3,31,252,2113,17684,147920,1237439,10351593, 86594795,724396370,6059833949,50692672540, 424062286786,3547432284249,29675536361423, 248246446379403,2076670068892280, 17372085836189001,145323694322280832]

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Last modified April 18 02:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)