A140354 as tables, graphs or sounds

A140354 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`20`
`2`		`220`
`3`		`1760`
`4`		`11440`
`5`		`64064`
`6`		`320320`
`7`		`1464320`
`8`		`6223360`
`9`		`24893440`
`10`		`94595072`
`11`		`343982080`
`12`		`1203937280`
`13`		`4074864640`
`14`		`13388840960`
`15`		`42844291072`
`16`		`133888409600`
`17`		`409541017600`
`18`		`1228623052800`
`19`		`3621204787200`
`20`		`10501493882880`
`21`		`30004268236800`

[1,20,220,1760,11440,64064,320320,1464320,6223360, 24893440,94595072,343982080,1203937280,4074864640, 13388840960,42844291072,133888409600,409541017600, 1228623052800,3621204787200,10501493882880, 30004268236800]

Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

AT&T Labs Research