A220828 - OEIS

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A220828 as a simple table

`n`		`a(n)`
`1`		`4`
`2`		`10`
`3`		`20`
`4`		`55`
`5`		`220`
`6`		`1040`
`7`		`5480`
`8`		`31420`
`9`		`190360`
`10`		`1202930`
`11`		`7848720`
`12`		`52543935`
`13`		`359182620`
`14`		`2498614620`
`15`		`17640615900`
`16`		`126142316865`
`17`		`912047139460`
`18`		`6658803466730`
`19`		`49035674140240`
`20`		`363881247076930`
`21`		`2718918248334300`
`22`		`20442286928323170`
`23`		`154564065790535680`
`24`		`1174669811887063830`

[4,10,20,55,220,1040,5480,31420,190360,1202930, 7848720,52543935,359182620,2498614620,17640615900, 126142316865,912047139460,6658803466730, 49035674140240,363881247076930,2718918248334300, 20442286928323170,154564065790535680, 1174669811887063830]

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Last modified September 14 13:32 EDT 2024. Contains 375921 sequences. (Running on oeis4.)