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”).

A307109 as a simple table

na(n)
11
21
34
45
55
65
711
811
912
1012
1112
1215
1321
1421
1521
1622
1722
1822
1928
2028
2134
2234
2334
2434
2535
2635
2738
2844
2944
3044
3150
3250
3350
3450
3550
3651
3757
3857
3963
4063
4163
4263
4369
4469
4569
4669
4769
4872
4979
5079
5179
5285
5385
5485
5585
5685
5791
5891
5991
6091
6197
6297
63103
64104
65104
66104

[1,1,4,5,5,5,11,11,12,12,12,15,21,21,21,22,22,22,
 28,28,34,34,34,34,35,35,38,44,44,44,50,50,50,50,
 50,51,57,57,63,63,63,63,69,69,69,69,69,72,79,79,
 79,85,85,85,85,85,91,91,91,91,97,97,103,104,104,
 104]