A000681 as tables, graphs or sounds

A000681 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`3`
`3`		`21`
`4`		`282`
`5`		`6210`
`6`		`202410`
`7`		`9135630`
`8`		`545007960`
`9`		`41514583320`
`10`		`3930730108200`
`11`		`452785322266200`
`12`		`62347376347779600`
`13`		`10112899541133589200`
`14`		`1908371363842760216400`
`15`		`414517594539154672566000`
`16`		`102681435747106627787376000`
`17`		`28772944645196614863048048000`

[1,1,3,21,282,6210,202410,9135630,545007960, 41514583320,3930730108200,452785322266200, 62347376347779600,10112899541133589200, 1908371363842760216400,414517594539154672566000, 102681435747106627787376000, 28772944645196614863048048000]

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

AT&T Labs Research