A055218 - OEIS

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A055218 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`15`
`3`		`51`
`4`		`168`
`5`		`540`
`6`		`1711`
`7`		`5365`
`8`		`16698`
`9`		`51679`
`10`		`159250`
`11`		`489048`
`12`		`1497681`
`13`		`4576140`
`14`		`13955895`
`15`		`42493677`
`16`		`129211818`
`17`		`392441049`
`18`		`1190716836`
`19`		`3609608838`
`20`		`10933915743`
`21`		`33097421223`
`22`		`100126350090`
`23`		`302737691646`
`24`		`914897836063`

[1,4,15,51,168,540,1711,5365,16698,51679,159250, 489048,1497681,4576140,13955895,42493677, 129211818,392441049,1190716836,3609608838, 10933915743,33097421223,100126350090,302737691646, 914897836063]

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)