A009253 as tables, graphs or sounds

A009253 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`6`
`4`		`21`
`5`		`112`
`6`		`717`
`7`		`4592`
`8`		`38857`
`9`		`318208`
`10`		`3158329`
`11`		`32169984`
`12`		`363525789`
`13`		`4399544320`
`14`		`56250039237`
`15`		`779244812288`
`16`		`11210469917713`
`17`		`173483433263104`
`18`		`2783865475754737`
`19`		`47421793222656000`
`20`		`840008000833503141`

[1,1,1,6,21,112,717,4592,38857,318208,3158329, 32169984,363525789,4399544320,56250039237, 779244812288,11210469917713,173483433263104, 2783865475754737,47421793222656000, 840008000833503141]

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research