A228867 - OEIS

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

A228867 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`8`
`4`		`140`
`5`		`3536`
`6`		`111118`
`7`		`4067460`
`8`		`167387778`
`9`		`7579673514`
`10`		`372383647086`
`11`		`19656714142024`
`12`		`1107002518847134`
`13`		`66161264225994340`
`14`		`4179178067931209524`
`15`		`278086164995822234072`
`16`		`19439660328872258046471`
`17`		`1424349675827697250143308`
`18`		`109166829826333936529736762`

[1,1,8,140,3536,111118,4067460,167387778, 7579673514,372383647086,19656714142024, 1107002518847134,66161264225994340, 4179178067931209524,278086164995822234072, 19439660328872258046471,1424349675827697250143308, 109166829826333936529736762]

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 13 09:21 EDT 2024. Contains 375904 sequences. (Running on oeis4.)