A000957 - OEIS

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A000957 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`0`
`3`		`1`
`4`		`2`
`5`		`6`
`6`		`18`
`7`		`57`
`8`		`186`
`9`		`622`
`10`		`2120`
`11`		`7338`
`12`		`25724`
`13`		`91144`
`14`		`325878`
`15`		`1174281`
`16`		`4260282`
`17`		`15548694`
`18`		`57048048`
`19`		`210295326`
`20`		`778483932`
`21`		`2892818244`
`22`		`10786724388`
`23`		`40347919626`
`24`		`151355847012`
`25`		`569274150156`
`26`		`2146336125648`
`27`		`8110508473252`
`28`		`30711521221376`

[0,1,0,1,2,6,18,57,186,622,2120,7338,25724,91144, 325878,1174281,4260282,15548694,57048048, 210295326,778483932,2892818244,10786724388, 40347919626,151355847012,569274150156, 2146336125648,8110508473252,30711521221376]

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Last modified April 24 13:23 EDT 2024. Contains 371955 sequences. (Running on oeis4.)