A108680 - OEIS

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A108680 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`18`
`2`		`140`
`3`		`700`
`4`		`2646`
`5`		`8232`
`6`		`22176`
`7`		`53460`
`8`		`117975`
`9`		`242242`
`10`		`468468`
`11`		`861224`
`12`		`1516060`
`13`		`2570400`
`14`		`4217088`
`15`		`6720984`
`16`		`10439037`
`17`		`15844290`
`18`		`23554300`
`19`		`34364484`
`20`		`49286930`
`21`		`69595240`
`22`		`96876000`
`23`		`133087500`
`24`		`180626355`
`25`		`242402706`
`26`		`321924708`
`27`		`423393040`

[1,18,140,700,2646,8232,22176,53460,117975,242242, 468468,861224,1516060,2570400,4217088,6720984, 10439037,15844290,23554300,34364484,49286930, 69595240,96876000,133087500,180626355,242402706, 321924708,423393040]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)