A018033 as tables, graphs or sounds

A018033 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`7`
`3`		`20`
`4`		`54`
`5`		`147`
`6`		`400`
`7`		`1085`
`8`		`2947`
`9`		`8000`
`10`		`21715`
`11`		`58944`
`12`		`160000`
`13`		`434306`
`14`		`1178890`
`15`		`3200000`
`16`		`8686136`
`17`		`23577801`
`18`		`64000000`
`19`		`173722727`
`20`		`471556031`
`21`		`1280000000`
`22`		`3474454549`
`23`		`9431120636`
`24`		`25600000000`

[1,2,7,20,54,147,400,1085,2947,8000,21715,58944, 160000,434306,1178890,3200000,8686136,23577801, 64000000,173722727,471556031,1280000000, 3474454549,9431120636,25600000000]

Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research