A123889 - OEIS

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A123889 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`16`
`3`		`58`
`4`		`208`
`5`		`740`
`6`		`2628`
`7`		`9327`
`8`		`33096`
`9`		`117432`
`10`		`416668`
`11`		`1478400`
`12`		`5245576`
`13`		`18612052`
`14`		`66038209`
`15`		`234312956`
`16`		`831375680`
`17`		`2949839102`
`18`		`10466448480`
`19`		`37136447100`
`20`		`131765393560`
`21`		`467522347871`
`22`		`1658835752336`
`23`		`5885785066224`
`24`		`20883602126968`
`25`		`74097989119616`

[1,4,16,58,208,740,2628,9327,33096,117432,416668, 1478400,5245576,18612052,66038209,234312956, 831375680,2949839102,10466448480,37136447100, 131765393560,467522347871,1658835752336, 5885785066224,20883602126968,74097989119616]

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Last modified April 17 21:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)