A024050 as tables, graphs or sounds

A024050 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`23`
`3`		`122`
`4`		`621`
`5`		`3120`
`6`		`15619`
`7`		`78118`
`8`		`390617`
`9`		`1953116`
`10`		`9765615`
`11`		`48828114`
`12`		`244140613`
`13`		`1220703112`
`14`		`6103515611`
`15`		`30517578110`
`16`		`152587890609`
`17`		`762939453108`
`18`		`3814697265607`
`19`		`19073486328106`
`20`		`95367431640605`

[1,4,23,122,621,3120,15619,78118,390617,1953116, 9765615,48828114,244140613,1220703112,6103515611, 30517578110,152587890609,762939453108, 3814697265607,19073486328106,95367431640605]

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

AT&T Labs Research