A002423 - OEIS

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A002423 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`-14`
`2`		`70`
`3`		`-140`
`4`		`70`
`5`		`28`
`6`		`28`
`7`		`40`
`8`		`70`
`9`		`140`
`10`		`308`
`11`		`728`
`12`		`1820`
`13`		`4760`
`14`		`12920`
`15`		`36176`
`16`		`104006`
`17`		`305900`
`18`		`917700`
`19`		`2801400`
`20`		`8684340`
`21`		`27293640`
`22`		`86843400`
`23`		`279409200`
`24`		`908079900`
`25`		`2978502072`
`26`		`9851968392`
`27`		`32839894640`

[1,-14,70,-140,70,28,28,40,70,140,308,728,1820, 4760,12920,36176,104006,305900,917700,2801400, 8684340,27293640,86843400,279409200,908079900, 2978502072,9851968392,32839894640]

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Last modified May 14 00:47 EDT 2024. Contains 372528 sequences. (Running on oeis4.)