login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A027488 as a simple table

n a(n)
3 1
4 30
5 1035
6 45675
7 2582209
8 183962268
9 16206744140
10 1734708878100
11 222083697846516
12 33544055541553128
13 5906505211210055088
14 1199823052824417425040
15 278598452852079082857744
16 73346715446248518553100160
17 21736011315987768499695624960

[1,30,1035,45675,2582209,183962268,16206744140,
 1734708878100,222083697846516,33544055541553128,
 5906505211210055088,1199823052824417425040,
 278598452852079082857744,
 73346715446248518553100160,
 21736011315987768499695624960]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 6 22:42 EST 2021. Contains 349567 sequences. (Running on oeis4.)