A026023 as tables, graphs or sounds

A026023 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`8`
`4`		`15`
`5`		`30`
`6`		`56`
`7`		`112`
`8`		`210`
`9`		`420`
`10`		`792`
`11`		`1584`
`12`		`3003`
`13`		`6006`
`14`		`11440`
`15`		`22880`
`16`		`43758`
`17`		`87516`
`18`		`167960`
`19`		`335920`
`20`		`646646`
`21`		`1293292`
`22`		`2496144`
`23`		`4992288`
`24`		`9657700`
`25`		`19315400`
`26`		`37442160`
`27`		`74884320`
`28`		`145422675`
`29`		`290845350`
`30`		`565722720`
`31`		`1131445440`
`32`		`2203961430`
`33`		`4407922860`

[1,2,4,8,15,30,56,112,210,420,792,1584,3003,6006, 11440,22880,43758,87516,167960,335920,646646, 1293292,2496144,4992288,9657700,19315400,37442160, 74884320,145422675,290845350,565722720,1131445440, 2203961430,4407922860]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research