A227978 - OEIS

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A227978 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`9`
`4`		`20`
`5`		`45`
`6`		`102`
`7`		`231`
`8`		`520`
`9`		`1161`
`10`		`2570`
`11`		`5643`
`12`		`12300`
`13`		`26637`
`14`		`57358`
`15`		`122895`
`16`		`262160`
`17`		`557073`
`18`		`1179666`
`19`		`2490387`
`20`		`5242900`
`21`		`11010069`
`22`		`23068694`
`23`		`48234519`
`24`		`100663320`
`25`		`209715225`
`26`		`436207642`
`27`		`905969691`
`28`		`1879048220`
`29`		`3892314141`
`30`		`8053063710`
`31`		`16642998303`

[1,2,4,9,20,45,102,231,520,1161,2570,5643,12300, 26637,57358,122895,262160,557073,1179666,2490387, 5242900,11010069,23068694,48234519,100663320, 209715225,436207642,905969691,1879048220, 3892314141,8053063710,16642998303]

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Last modified April 19 03:05 EDT 2024. Contains 371782 sequences. (Running on oeis4.)