A278556 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A278556 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`19`
`2`		`209`
`3`		`1710`
`4`		`11495`
`5`		`66862`
`6`		`347339`
`7`		`1645875`
`8`		`7221520`
`9`		`29668595`
`10`		`115116233`
`11`		`424720338`
`12`		`1498263563`
`13`		`5076482415`
`14`		`16583497160`
`15`		`52399330389`
`16`		`160586833362`
`17`		`478482249548`
`18`		`1388989067820`
`19`		`3935549005725`
`20`		`10901608510397`
`21`		`29565343541110`
`22`		`78604103339462`

[1,19,209,1710,11495,66862,347339,1645875,7221520, 29668595,115116233,424720338,1498263563, 5076482415,16583497160,52399330389,160586833362, 478482249548,1388989067820,3935549005725, 10901608510397,29565343541110,78604103339462]

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 9 12:21 EDT 2024. Contains 372350 sequences. (Running on oeis4.)