A055580 - OEIS

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A055580 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`7`
`2`		`31`
`3`		`111`
`4`		`351`
`5`		`1023`
`6`		`2815`
`7`		`7423`
`8`		`18943`
`9`		`47103`
`10`		`114687`
`11`		`274431`
`12`		`647167`
`13`		`1507327`
`14`		`3473407`
`15`		`7929855`
`16`		`17956863`
`17`		`40370175`
`18`		`90177535`
`19`		`200278015`
`20`		`442499071`
`21`		`973078527`
`22`		`2130706431`
`23`		`4647288831`
`24`		`10099884031`
`25`		`21877489663`

[1,7,31,111,351,1023,2815,7423,18943,47103,114687, 274431,647167,1507327,3473407,7929855,17956863, 40370175,90177535,200278015,442499071,973078527, 2130706431,4647288831,10099884031,21877489663]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)