A007122 - OEIS

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A007122 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`0`
`3`		`0`
`4`		`0`
`5`		`0`
`6`		`2`
`7`		`4`
`8`		`15`
`9`		`36`
`10`		`108`
`11`		`276`
`12`		`770`
`13`		`2036`
`14`		`5586`
`15`		`15072`
`16`		`41370`
`17`		`113184`
`18`		`312488`
`19`		`863824`
`20`		`2401344`
`21`		`6692368`
`22`		`18724990`
`23`		`52531788`
`24`		`147824963`
`25`		`417006316`
`26`		`1179285900`
`27`		`3342274092`
`28`		`9492427854`
`29`		`27011049612`
`30`		`76999988534`

[0,0,0,0,0,2,4,15,36,108,276,770,2036,5586,15072, 41370,113184,312488,863824,2401344,6692368, 18724990,52531788,147824963,417006316,1179285900, 3342274092,9492427854,27011049612,76999988534]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)