A289653 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A289653 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`4`
`5`		`12`
`6`		`40`
`7`		`130`
`8`		`427`
`9`		`1428`
`10`		`4860`
`11`		`16794`
`12`		`58784`
`13`		`208010`
`14`		`742898`
`15`		`2674438`
`16`		`9694843`
`17`		`35357668`
`18`		`129644788`
`19`		`477638698`
`20`		`1767263188`
`21`		`6564120418`
`22`		`24466267018`
`23`		`91482563638`
`24`		`343059613648`
`25`		`1289904147322`
`26`		`4861946401450`
`27`		`18367353072150`
`28`		`69533550916002`
`29`		`263747951750358`

[1,1,1,4,12,40,130,427,1428,4860,16794,58784, 208010,742898,2674438,9694843,35357668,129644788, 477638698,1767263188,6564120418,24466267018, 91482563638,343059613648,1289904147322, 4861946401450,18367353072150,69533550916002, 263747951750358]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 23:40 EDT 2024. Contains 371798 sequences. (Running on oeis4.)