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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”).

A318287 as a simple table

na(n)
11
21
31
42
52
63
72
83
94
105
113
127
134
147
159
165
175
1812
196
2012
2114
2210
238
2413
2512
2614
2714
2818
2910
3034

[1,1,1,2,2,3,2,3,4,5,3,7,4,7,9,5,5,12,6,12,14,10,
 8,13,12,14,14,18,10,34]