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”).

A166899 as a simple table

na(n)
11
23
325
4111
5456
62697
715961
886247
9495781
103003738
1117946798
12107667969
13660458787
144081397547
1525274724105
16157744019799
17991384251102
186254115981009
1939613066988527
20252017709962526
211608980424431755

[1,3,25,111,456,2697,15961,86247,495781,3003738,
 17946798,107667969,660458787,4081397547,
 25274724105,157744019799,991384251102,
 6254115981009,39613066988527,252017709962526,
 1608980424431755]