A026127 as tables, graphs or sounds

A026127 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`20`
`4`		`110`
`5`		`608`
`6`		`3409`
`7`		`19304`
`8`		`110187`
`9`		`632960`
`10`		`3654915`
`11`		`21195716`
`12`		`123365099`
`13`		`720240584`
`14`		`4216176575`
`15`		`24738092400`
`16`		`145444454754`
`17`		`856662911136`
`18`		`5053815390148`
`19`		`29857490333880`
`20`		`176624209891024`

[1,4,20,110,608,3409,19304,110187,632960,3654915, 21195716,123365099,720240584,4216176575, 24738092400,145444454754,856662911136, 5053815390148,29857490333880,176624209891024]

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research