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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”).

A239105 as a simple table

na(n)
11
21
32
42
53
64
74
84
95
106
116
127
138
148
158
168
179
1810
1911
2012
2112
2213
2314
2414

[1,1,2,2,3,4,4,4,5,6,6,7,8,8,8,8,9,10,11,12,12,13,
 14,14]