A023020 as tables, graphs or sounds

A023020 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`22`
`2`		`275`
`3`		`2530`
`4`		`18975`
`5`		`122430`
`6`		`702328`
`7`		`3661900`
`8`		`17627775`
`9`		`79264900`
`10`		`335937954`
`11`		`1351507830`
`12`		`5191041625`
`13`		`19125838600`
`14`		`67862904725`
`15`		`232671319474`
`16`		`773027485065`
`17`		`2494957906100`
`18`		`7839428942950`
`19`		`24025993453000`
`20`		`71941861591215`

[1,22,275,2530,18975,122430,702328,3661900, 17627775,79264900,335937954,1351507830,5191041625, 19125838600,67862904725,232671319474,773027485065, 2494957906100,7839428942950,24025993453000, 71941861591215]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research