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”).

A124111 as a simple table

na(n)
15
27
311
423
531
6191
7409
81151
92161
102689
113361
124729
139601
1414281
1523209
1631249
1733049
1855441
1971761
20110881
212116921
223384481
235109721
24222855361
25288940681
26567719161
27831143041
28899978641

[5,7,11,23,31,191,409,1151,2161,2689,3361,4729,
 9601,14281,23209,31249,33049,55441,71761,110881,
 2116921,3384481,5109721,222855361,288940681,
 567719161,831143041,899978641]