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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”).

A344881 as a simple table

na(n)
11
22
33
44
55
67
78
89
911
1012
1113
1214
1315
1416
1517
1619
1720
1822
1923
2025
2127
2229
2330
2431
2532
2633
2735
2837
2938
3041
3142
3243
3344
3445
3546
3647
3748
3849
3951
4052
4153
4254
4356
4459
4561
4662
4763
4864
4965
5067
5169
5270
5371
5472
5573
5676
5777
5879
5980
6081
6183
6284
6385
6486
6587
6689
6790
6891
6994
7095
7197
7299
73101
74102
75103
76104
77107
78108
79109
80110

[1,2,3,4,5,7,8,9,11,12,13,14,15,16,17,19,20,22,23,
 25,27,29,30,31,32,33,35,37,38,41,42,43,44,45,46,
 47,48,49,51,52,53,54,56,59,61,62,63,64,65,67,69,
 70,71,72,73,76,77,79,80,81,83,84,85,86,87,89,90,
 91,94,95,97,99,101,102,103,104,107,108,109,110]