A027288 - OEIS

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A027288 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`12`
`3`		`46`
`4`		`145`
`5`		`552`
`6`		`1820`
`7`		`6918`
`8`		`23562`
`9`		`89645`
`10`		`312664`
`11`		`1191885`
`12`		`4232345`
`13`		`16170728`
`14`		`58229100`
`15`		`222997812`
`16`		`811985790`
`17`		`3116622123`
`18`		`11451785640`
`19`		`44047806725`
`20`		`163072988442`
`21`		`628465576101`
`22`		`2341484487832`
`23`		`9040083756276`
`24`		`33863310322100`
`25`		`130957152428622`

[1,4,12,46,145,552,1820,6918,23562,89645,312664, 1191885,4232345,16170728,58229100,222997812, 811985790,3116622123,11451785640,44047806725, 163072988442,628465576101,2341484487832, 9040083756276,33863310322100,130957152428622]

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Last modified April 24 12:29 EDT 2024. Contains 371937 sequences. (Running on oeis4.)