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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”).

A033766 as a simple table

na(n)
11
21
32
43
56
68
711
820
929
1047
1178
12129
13230
14400
15710
161221

[1,1,2,3,6,8,11,20,29,47,78,129,230,400,710,1221]