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”).

A070925 as a simple table

na(n)
11
21
33
43
57
67
719
817
951
1047
11151
12137
13471
14427
151519
161391
175043
184651
1917111
2015883
2159007
2255123
23206259
24193723
25729095
26688007
272601639
282465133
299358943
308899699
3133904323
3232342235
33123580883
34118215779
35452902071
36434314137
371667837679
381602935103

[1,1,3,3,7,7,19,17,51,47,151,137,471,427,1519,
 1391,5043,4651,17111,15883,59007,55123,206259,
 193723,729095,688007,2601639,2465133,9358943,
 8899699,33904323,32342235,123580883,118215779,
 452902071,434314137,1667837679,1602935103]