A071723 as tables, graphs or sounds

A071723 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`15`
`3`		`54`
`4`		`192`
`5`		`682`
`6`		`2431`
`7`		`8710`
`8`		`31382`
`9`		`113696`
`10`		`414086`
`11`		`1515516`
`12`		`5571750`
`13`		`20569590`
`14`		`76228095`
`15`		`283481670`
`16`		`1057628550`
`17`		`3957577800`
`18`		`14849601090`
`19`		`55859886420`
`20`		`210622646520`
`21`		`795898303668`
`22`		`3013646759910`
`23`		`11432740177564`

[1,4,15,54,192,682,2431,8710,31382,113696,414086, 1515516,5571750,20569590,76228095,283481670, 1057628550,3957577800,14849601090,55859886420, 210622646520,795898303668,3013646759910, 11432740177564]

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

AT&T Labs Research