A051721 - OEIS

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A051721 as a simple table

`n`		`a(n)`
`0`		`4`
`1`		`5`
`2`		`15`
`3`		`35`
`4`		`105`
`5`		`105`
`6`		`105`
`7`		`165`
`8`		`165`
`9`		`455`
`10`		`15015`
`11`		`1365`
`12`		`1365`
`13`		`255`
`14`		`255`
`15`		`11305`
`16`		`33915`
`17`		`21945`
`18`		`21945`
`19`		`345`
`20`		`3795`
`21`		`10465`
`22`		`31395`
`23`		`1365`
`24`		`1365`
`25`		`435`
`26`		`435`
`27`		`346115`
`28`		`1038345`
`29`		`55335`
`30`		`608685`
`31`		`255`
`32`		`255`
`33`		`319865`
`34`		`959595`
`35`		`959595`
`36`		`959595`
`37`		`6765`
`38`		`6765`
`39`		`61705`

[4,5,15,35,105,105,105,165,165,455,15015,1365, 1365,255,255,11305,33915,21945,21945,345,3795, 10465,31395,1365,1365,435,435,346115,1038345, 55335,608685,255,255,319865,959595,959595,959595, 6765,6765,61705]

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Last modified September 12 11:08 EDT 2024. Contains 375850 sequences. (Running on oeis4.)