A005560 - OEIS

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A005560 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`3`
`4`		`15`
`5`		`45`
`6`		`189`
`7`		`588`
`8`		`2352`
`9`		`7560`
`10`		`29700`
`11`		`98010`
`12`		`382239`
`13`		`1288287`
`14`		`5010005`
`15`		`17177160`
`16`		`66745536`
`17`		`232092432`
`18`		`901995588`
`19`		`3173688180`
`20`		`12342120700`
`21`		`43861998180`
`22`		`170724392916`
`23`		`611947174608`
`24`		`2384209771200`
`25`		`8609646396000`
`26`		`33577620944400`
`27`		`122041737663300`
`28`		`476432168185575`

[1,3,15,45,189,588,2352,7560,29700,98010,382239, 1288287,5010005,17177160,66745536,232092432, 901995588,3173688180,12342120700,43861998180, 170724392916,611947174608,2384209771200, 8609646396000,33577620944400,122041737663300, 476432168185575]

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Last modified April 16 04:38 EDT 2024. Contains 371696 sequences. (Running on oeis4.)