login

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A015525 as a simple table

na(n)
00
11
23
317
475
5361
61683
77937
837275
9175321
10824163
113875057
1218218475
1385655881
14402715443
151893393377
168901903675
1741852858041
18196773803523
19925144274897
204349623252875
2120450023957801
2296147057896403

[0,1,3,17,75,361,1683,7937,37275,175321,824163,
 3875057,18218475,85655881,402715443,1893393377,
 8901903675,41852858041,196773803523,925144274897,
 4349623252875,20450023957801,96147057896403]