A047990 - OEIS

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A047990 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`14`
`4`		`54`
`5`		`292`
`6`		`1696`
`7`		`12500`
`8`		`97300`
`9`		`909800`
`10`		`8888400`
`11`		`100778200`
`12`		`1185163000`
`13`		`15798002000`
`14`		`217275712000`
`15`		`3329482106000`
`16`		`52433793018000`
`17`		`908110694260000`
`18`		`16113910669480000`
`19`		`311249886303980000`
`20`		`6144485548655740000`

[1,2,4,14,54,292,1696,12500,97300,909800,8888400, 100778200,1185163000,15798002000,217275712000, 3329482106000,52433793018000,908110694260000, 16113910669480000,311249886303980000, 6144485548655740000]

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)