A180140 - OEIS

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A180140 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`18`
`3`		`74`
`4`		`312`
`5`		`1306`
`6`		`5478`
`7`		`22964`
`8`		`96282`
`9`		`403666`
`10`		`1692408`
`11`		`7095554`
`12`		`29748702`
`13`		`124723876`
`14`		`522915138`
`15`		`2192364794`
`16`		`9191670072`
`17`		`38536834186`
`18`		`161568852918`
`19`		`677390729684`
`20`		`2840016453642`
`21`		`11907003009346`
`22`		`49921091296248`

[1,4,18,74,312,1306,5478,22964,96282,403666, 1692408,7095554,29748702,124723876,522915138, 2192364794,9191670072,38536834186,161568852918, 677390729684,2840016453642,11907003009346, 49921091296248]

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Last modified April 25 12:15 EDT 2024. Contains 371969 sequences. (Running on oeis4.)