A027271 - OEIS

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A027271 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`18`
`3`		`48`
`4`		`180`
`5`		`432`
`6`		`1512`
`7`		`3456`
`8`		`11664`
`9`		`25920`
`10`		`85536`
`11`		`186624`
`12`		`606528`
`13`		`1306368`
`14`		`4199040`
`15`		`8957952`
`16`		`28553472`
`17`		`60466176`
`18`		`191476224`
`19`		`403107840`
`20`		`1269789696`
`21`		`2660511744`
`22`		`8344332288`
`23`		`17414258688`
`24`		`54419558400`
`25`		`113192681472`
`26`		`352638738432`
`27`		`731398864896`
`28`		`2272560758784`

[1,4,18,48,180,432,1512,3456,11664,25920,85536, 186624,606528,1306368,4199040,8957952,28553472, 60466176,191476224,403107840,1269789696, 2660511744,8344332288,17414258688,54419558400, 113192681472,352638738432,731398864896, 2272560758784]

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Last modified August 31 05:08 EDT 2024. Contains 375550 sequences. (Running on oeis4.)