A007451 as tables, graphs or sounds

A007451 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`3`
`3`		`90`
`4`		`18`
`5`		`945`
`6`		`1890`
`7`		`12600`
`8`		`22680`
`9`		`53460`
`10`		`1247400`
`11`		`10216206000`
`12`		`157172400`
`13`		`1021620600`
`14`		`6129723600`
`15`		`534386160000`
`16`		`81729648000`
`17`		`2494674910728000`
`18`		`127932046704000`
`19`		`2744142401800800000`

[1,3,3,90,18,945,1890,12600,22680,53460,1247400, 10216206000,157172400,1021620600,6129723600, 534386160000,81729648000,2494674910728000, 127932046704000,2744142401800800000]

Last modified December 17 13:29 EST 2009. Contains 170826 sequences.

AT&T Labs Research