A002870 - OEIS

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A002870 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`3`
`4`		`7`
`5`		`25`
`6`		`90`
`7`		`350`
`8`		`1701`
`9`		`7770`
`10`		`42525`
`11`		`246730`
`12`		`1379400`
`13`		`9321312`
`14`		`63436373`
`15`		`420693273`
`16`		`3281882604`
`17`		`25708104786`
`18`		`197462483400`
`19`		`1709751003480`
`20`		`15170932662679`
`21`		`132511015347084`
`22`		`1241963303533920`
`23`		`12320068811796900`
`24`		`120622574326072500`
`25`		`1203163392175387500`

[1,1,3,7,25,90,350,1701,7770,42525,246730,1379400, 9321312,63436373,420693273,3281882604,25708104786, 197462483400,1709751003480,15170932662679, 132511015347084,1241963303533920, 12320068811796900,120622574326072500, 1203163392175387500]

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Last modified April 24 13:41 EDT 2024. Contains 371957 sequences. (Running on oeis4.)