A155181 - OEIS

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

A155181 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`104`
`4`		`540`
`5`		`2804`
`6`		`14560`
`7`		`75604`
`8`		`392580`
`9`		`2038504`
`10`		`10585100`
`11`		`54964004`
`12`		`285405120`
`13`		`1481989604`
`14`		`7695353140`
`15`		`39958755304`
`16`		`207489129660`
`17`		`1077404403604`
`18`		`5594511147680`
`19`		`29049960142004`
`20`		`150844311857700`
`21`		`783271519430504`

[1,4,20,104,540,2804,14560,75604,392580,2038504, 10585100,54964004,285405120,1481989604,7695353140, 39958755304,207489129660,1077404403604, 5594511147680,29049960142004,150844311857700, 783271519430504]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)