A026153 - OEIS

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A026153 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`2`
`4`		`7`
`5`		`20`
`6`		`60`
`7`		`176`
`8`		`517`
`9`		`1512`
`10`		`4415`
`11`		`12870`
`12`		`37477`
`13`		`109044`
`14`		`317109`
`15`		`921870`
`16`		`2679510`
`17`		`7787904`
`18`		`22636503`
`19`		`65804638`
`20`		`191332945`
`21`		`556456060`
`22`		`1618813834`
`23`		`4710869108`
`24`		`13713658368`
`25`		`39935698400`
`26`		`116340344575`
`27`		`339050396646`
`28`		`988474306017`

[1,2,7,20,60,176,517,1512,4415,12870,37477,109044, 317109,921870,2679510,7787904,22636503,65804638, 191332945,556456060,1618813834,4710869108, 13713658368,39935698400,116340344575,339050396646, 988474306017]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)