A280621 - OEIS

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A280621 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`0`
`4`		`1`
`5`		`20`
`6`		`1`
`7`		`420`
`8`		`1841`
`9`		`7140`
`10`		`190001`
`11`		`555940`
`12`		`12774881`
`13`		`141201060`
`14`		`946212001`
`15`		`25228809060`
`16`		`202847031121`
`17`		`3740829095780`
`18`		`66881800434001`
`19`		`733452394335780`
`20`		`19147386646802561`
`21`		`273971147946411300`
`22`		`5322649952666824001`
`23`		`124410236296546608100`
`24`		`2010649742531247641201`
`25`		`53865539929721514523620`
`26`		`1113617365649653498950001`

[1,0,1,0,1,20,1,420,1841,7140,190001,555940, 12774881,141201060,946212001,25228809060, 202847031121,3740829095780,66881800434001, 733452394335780,19147386646802561, 273971147946411300,5322649952666824001, 124410236296546608100,2010649742531247641201, 53865539929721514523620,1113617365649653498950001]

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Last modified August 28 05:00 EDT 2024. Contains 375477 sequences. (Running on oeis4.)