A005221 - OEIS

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A005221 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`1`
`3`		`1`
`4`		`3`
`5`		`4`
`6`		`12`
`7`		`22`
`8`		`61`
`9`		`128`
`10`		`335`
`11`		`756`
`12`		`1936`
`13`		`4580`
`14`		`11652`
`15`		`28402`
`16`		`72209`
`17`		`179460`
`18`		`457274`
`19`		`1151725`
`20`		`2945129`
`21`		`7489680`
`22`		`19228598`
`23`		`49256157`
`24`		`126958030`
`25`		`327072560`
`26`		`846173899`
`27`		`2190012371`
`28`		`5685200054`
`29`		`14770728584`
`30`		`38463268482`
`31`		`100259225816`

[0,0,1,1,3,4,12,22,61,128,335,756,1936,4580,11652, 28402,72209,179460,457274,1151725,2945129,7489680, 19228598,49256157,126958030,327072560,846173899, 2190012371,5685200054,14770728584,38463268482, 100259225816]

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Last modified May 26 02:53 EDT 2013. Contains 225653 sequences.