A167993 - OEIS

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A167993 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`1`
`3`		`3`
`4`		`12`
`5`		`36`
`6`		`117`
`7`		`351`
`8`		`1080`
`9`		`3240`
`10`		`9801`
`11`		`29403`
`12`		`88452`
`13`		`265356`
`14`		`796797`
`15`		`2390391`
`16`		`7173360`
`17`		`21520080`
`18`		`64566801`
`19`		`193700403`
`20`		`581120892`
`21`		`1743362676`
`22`		`5230147077`
`23`		`15690441231`
`24`		`47071500840`
`25`		`141214502520`
`26`		`423644039001`
`27`		`1270932117003`
`28`		`3812797945332`
`29`		`11438393835996`

[0,0,1,3,12,36,117,351,1080,3240,9801,29403,88452, 265356,796797,2390391,7173360,21520080,64566801, 193700403,581120892,1743362676,5230147077, 15690441231,47071500840,141214502520,423644039001, 1270932117003,3812797945332,11438393835996]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)