A213589 - OEIS

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A213589 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`6`
`3`		`20`
`4`		`55`
`5`		`135`
`6`		`308`
`7`		`668`
`8`		`1395`
`9`		`2830`
`10`		`5610`
`11`		`10914`
`12`		`20904`
`13`		`39515`
`14`		`73860`
`15`		`136720`
`16`		`250937`
`17`		`457137`
`18`		`827260`
`19`		`1488190`
`20`		`2662905`
`21`		`4741946`
`22`		`8407236`
`23`		`14846100`
`24`		`26120400`
`25`		`45801925`
`26`		`80064018`
`27`		`139553708`
`28`		`242597035`
`29`		`420678315`
`30`		`727792580`

[1,6,20,55,135,308,668,1395,2830,5610,10914,20904, 39515,73860,136720,250937,457137,827260,1488190, 2662905,4741946,8407236,14846100,26120400, 45801925,80064018,139553708,242597035,420678315, 727792580]

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)