login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A039777 as a simple table

na(n)
12
25
321
445
5285
6765
727645
8196605
941067645
1072787965
11250871805
124295098365
1312884901885
1423307153405
15172130669565
161766029428523005
1720978888016396285

[2,5,21,45,285,765,27645,196605,41067645,72787965,
 250871805,4295098365,12884901885,23307153405,
 172130669565,1766029428523005,20978888016396285]