A181567 - OEIS

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A181567 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`2`
`5`		`3`
`6`		`2`
`7`		`1`
`8`		`1`
`9`		`3`
`10`		`6`
`11`		`10`
`12`		`12`
`13`		`12`
`14`		`10`
`15`		`6`
`16`		`3`
`17`		`1`
`18`		`1`
`19`		`4`
`20`		`10`
`21`		`20`
`22`		`35`
`23`		`52`
`24`		`68`
`25`		`80`
`26`		`85`
`27`		`80`
`28`		`68`
`29`		`52`
`30`		`35`
`31`		`20`
`32`		`10`
`33`		`4`
`34`		`1`
`35`		`1`
`36`		`5`
`37`		`15`
`38`		`35`
`39`		`70`
`40`		`126`
`41`		`205`
`42`		`305`
`43`		`420`
`44`		`540`
`45`		`651`
`46`		`735`
`47`		`780`
`48`		`780`
`49`		`735`
`50`		`651`
`51`		`540`
`52`		`420`
`53`		`305`
`54`		`205`
`55`		`126`
`56`		`70`
`57`		`35`
`58`		`15`
`59`		`5`
`60`		`1`
`61`		`1`
`62`		`6`
`63`		`21`
`64`		`56`
`65`		`126`
`66`		`252`
`67`		`462`
`68`		`786`
`69`		`1251`

[1,1,1,1,2,3,2,1,1,3,6,10,12,12,10,6,3,1,1,4,10, 20,35,52,68,80,85,80,68,52,35,20,10,4,1,1,5,15,35, 70,126,205,305,420,540,651,735,780,780,735,651, 540,420,305,205,126,70,35,15,5,1,1,6,21,56,126, 252,462,786,1251]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)