A007840 - OEIS

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A007840 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`3`
`3`		`14`
`4`		`88`
`5`		`694`
`6`		`6578`
`7`		`72792`
`8`		`920904`
`9`		`13109088`
`10`		`207360912`
`11`		`3608233056`
`12`		`68495486640`
`13`		`1408631978064`
`14`		`31197601660080`
`15`		`740303842925184`
`16`		`18738231641600256`
`17`		`503937595069600896`
`18`		`14349899305396086912`
`19`		`431322634732516137216`
`20`		`13646841876634025159424`

[1,1,3,14,88,694,6578,72792,920904,13109088, 207360912,3608233056,68495486640,1408631978064, 31197601660080,740303842925184,18738231641600256, 503937595069600896,14349899305396086912, 431322634732516137216,13646841876634025159424]

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