A009409 - OEIS

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A009409 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`-1`
`3`		`-1`
`4`		`0`
`5`		`49`
`6`		`-165`
`7`		`-393`
`8`		`-504`
`9`		`66753`
`10`		`-414225`
`11`		`21295`
`12`		`-15435816`
`13`		`561504241`
`14`		`-5685997317`
`15`		`34755442407`
`16`		`-746778152400`
`17`		`18822723988481`
`18`		`-281687621998401`
`19`		`3781703063806559`
`20`		`-80079140948241200`
`21`		`1899387285774263089`

[0,1,-1,-1,0,49,-165,-393,-504,66753,-414225, 21295,-15435816,561504241,-5685997317,34755442407, -746778152400,18822723988481,-281687621998401, 3781703063806559,-80079140948241200, 1899387285774263089]

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)