A218657 - OEIS

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A218657 as a simple table

`n`		`a(n)`
`1`		`3`
`2`		`15`
`3`		`57`
`4`		`225`
`5`		`891`
`6`		`3519`
`7`		`13905`
`8`		`54945`
`9`		`217107`
`10`		`857871`
`11`		`3389769`
`12`		`13394241`
`13`		`52925643`
`14`		`209128959`
`15`		`826346529`
`16`		`3265203393`
`17`		`12902036643`
`18`		`50980759695`
`19`		`201443999193`
`20`		`795980386593`
`21`		`3145215436443`
`22`		`12427919466687`
`23`		`49107345869169`

[3,15,57,225,891,3519,13905,54945,217107,857871, 3389769,13394241,52925643,209128959,826346529, 3265203393,12902036643,50980759695,201443999193, 795980386593,3145215436443,12427919466687, 49107345869169]

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)