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”).

A199919 as a simple table

na(n)
13
27
39
415
59
625
79
831
927
1037
119
1257
139
1449
1549
1663
179
1879
199
2085
2165
2249
239
24121
2527
2649
2781
28113
299
30145
319
32127
3381
3449
3569
36183
379
3849
3981
40181
419
42193
439
44169
45157
4649
479
48249
4927
50187
5181
52197
539
54241
5569
56241
5781
5849
599
60337
619
6249
63209
64255
6581
66289

[3,7,9,15,9,25,9,31,27,37,9,57,9,49,49,63,9,79,9,
 85,65,49,9,121,27,49,81,113,9,145,9,127,81,49,69,
 183,9,49,81,181,9,193,9,169,157,49,9,249,27,187,
 81,197,9,241,69,241,81,49,9,337,9,49,209,255,81,
 289]