A020557 - OEIS

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

A020557 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`15`
`3`		`203`
`4`		`4140`
`5`		`115975`
`6`		`4213597`
`7`		`190899322`
`8`		`10480142147`
`9`		`682076806159`
`10`		`51724158235372`
`11`		`4506715738447323`
`12`		`445958869294805289`
`13`		`49631246523618756274`
`14`		`6160539404599934652455`
`15`		`846749014511809332450147`
`16`		`128064670049908713818925644`

[1,2,15,203,4140,115975,4213597,190899322, 10480142147,682076806159,51724158235372, 4506715738447323,445958869294805289, 49631246523618756274,6160539404599934652455, 846749014511809332450147, 128064670049908713818925644]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)