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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”).

A111214 as a simple table

na(n)
10
20
31
41
52
63
75
811
911
1011
1111
1211
1311
1411
1511
1611
1711

[0,0,1,1,2,3,5,11,11,11,11,11,11,11,11,11,11]