A017964 - OEIS

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A017964 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`89`
`4`		`400`
`5`		`1788`
`6`		`8000`
`7`		`35777`
`8`		`160000`
`9`		`715541`
`10`		`3200000`
`11`		`14310835`
`12`		`64000000`
`13`		`286216701`
`14`		`1280000000`
`15`		`5724334022`
`16`		`25600000000`
`17`		`114486680447`
`18`		`512000000000`
`19`		`2289733608959`
`20`		`10240000000000`
`21`		`45794672179195`

[1,4,20,89,400,1788,8000,35777,160000,715541, 3200000,14310835,64000000,286216701,1280000000, 5724334022,25600000000,114486680447,512000000000, 2289733608959,10240000000000,45794672179195]

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Last modified May 31 23:52 EDT 2024. Contains 373008 sequences. (Running on oeis4.)