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”).

A138961 as a simple table

na(n)
11
23
341
4617
5823
6643
79721
814593
93803
1014405693
1110939223
124156374407
132663693
145603770631
151221751714624799
16287108811653770498027
1774103167823547
1811843077531813991
19726216405947772436185983423
20769725127
2118274551225153265813469

[1,3,41,617,823,643,9721,14593,3803,14405693,
 10939223,4156374407,2663693,5603770631,
 1221751714624799,287108811653770498027,
 74103167823547,11843077531813991,
 726216405947772436185983423,769725127,
 18274551225153265813469]