A143523 as tables, graphs or sounds

A143523 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`10`
`3`		`42`
`4`		`248`
`5`		`1992`
`6`		`19600`
`7`		`222288`
`8`		`2851712`
`9`		`41075328`
`10`		`658359040`
`11`		`11621260032`
`12`		`223832419328`
`13`		`4669549335552`
`14`		`104894256056320`
`15`		`2524539033397248`
`16`		`64811332658757632`
`17`		`1767891945806266368`
`18`		`51060500413513400320`

[1,3,10,42,248,1992,19600,222288,2851712,41075328, 658359040,11621260032,223832419328,4669549335552, 104894256056320,2524539033397248, 64811332658757632,1767891945806266368, 51060500413513400320]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research