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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”).

A247000 as a simple table

na(n)
11
22
34
46
57
69
710
812
913
1015
1116
1218
1319
1421
1523
1624
1726
1828
1929
2031
2133
2234
2336
2438
2539
2641
2743
2844
2946
3048

[1,2,4,6,7,9,10,12,13,15,16,18,19,21,23,24,26,28,
 29,31,33,34,36,38,39,41,43,44,46,48]