A247307 - OEIS

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A247307 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`6`
`3`		`20`
`4`		`63`
`5`		`204`
`6`		`682`
`7`		`2340`
`8`		`381300`
`9`		`1398101`
`10`		`5162220`
`11`		`71582788`
`12`		`1010580540`
`13`		`14467258260`
`14`		`3059510616420`
`15`		`2573485501354569`
`16`		`9938978487990060`
`17`		`148764065110560900`
`18`		`510526106256177860940`
`19`		`117943982401427236556700`
`20`		`1799331452449680632120820`

[0,6,20,63,204,682,2340,381300,1398101,5162220, 71582788,1010580540,14467258260,3059510616420, 2573485501354569,9938978487990060, 148764065110560900,510526106256177860940, 117943982401427236556700, 1799331452449680632120820]

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Last modified August 22 01:28 EDT 2024. Contains 375353 sequences. (Running on oeis4.)