A026305 - OEIS

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A026305 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`20`
`4`		`104`
`5`		`560`
`6`		`3080`
`7`		`17199`
`8`		`97120`
`9`		`553146`
`10`		`3171860`
`11`		`18288127`
`12`		`105922544`
`13`		`615820400`
`14`		`3591858480`
`15`		`21008159700`
`16`		`123169357728`
`17`		`723659556026`
`18`		`4259672761560`
`19`		`25115352874780`
`20`		`148302374872080`
`21`		`876876653336922`
`22`		`5191051724957736`

[1,4,20,104,560,3080,17199,97120,553146,3171860, 18288127,105922544,615820400,3591858480, 21008159700,123169357728,723659556026, 4259672761560,25115352874780,148302374872080, 876876653336922,5191051724957736]

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Last modified April 19 12:06 EDT 2024. Contains 371792 sequences. (Running on oeis4.)