A003688 - OEIS

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A003688 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`13`
`4`		`43`
`5`		`142`
`6`		`469`
`7`		`1549`
`8`		`5116`
`9`		`16897`
`10`		`55807`
`11`		`184318`
`12`		`608761`
`13`		`2010601`
`14`		`6640564`
`15`		`21932293`
`16`		`72437443`
`17`		`239244622`
`18`		`790171309`
`19`		`2609758549`
`20`		`8619446956`
`21`		`28468099417`
`22`		`94023745207`
`23`		`310539335038`
`24`		`1025641750321`
`25`		`3387464586001`
`26`		`11188035508324`
`27`		`36951571110973`

[1,4,13,43,142,469,1549,5116,16897,55807,184318, 608761,2010601,6640564,21932293,72437443, 239244622,790171309,2609758549,8619446956, 28468099417,94023745207,310539335038, 1025641750321,3387464586001,11188035508324, 36951571110973]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)