A001253 - OEIS

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A001253 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`0`
`3`		`0`
`4`		`0`
`5`		`2`
`6`		`20`
`7`		`198`
`8`		`2048`
`9`		`22468`
`10`		`264538`
`11`		`3340962`
`12`		`45173518`
`13`		`652209564`
`14`		`10024669626`
`15`		`163546399460`
`16`		`2823941647390`
`17`		`51468705947590`
`18`		`987671243816650`
`19`		`19909066390361346`
`20`		`420650676776338140`
`21`		`9297308938203169622`
`22`		`214562999510569012168`

[0,0,0,0,2,20,198,2048,22468,264538,3340962, 45173518,652209564,10024669626,163546399460, 2823941647390,51468705947590,987671243816650, 19909066390361346,420650676776338140, 9297308938203169622,214562999510569012168]

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Last modified April 19 14:10 EDT 2024. Contains 371792 sequences. (Running on oeis4.)