login

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

A018997 as a simple table

na(n)
22
37
436
5230
61104
76657
838976
9247431
101617560
1110806202
1273706144
13510591393
143568689922
1525130781435
16178056349424

[2,7,36,230,1104,6657,38976,247431,1617560,
 10806202,73706144,510591393,3568689922,
 25130781435,178056349424]