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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”).

A156802 as a simple table

na(n)
11
21
31
42
53
68
715
843
9110
10370
111260
125366
1325684
14154104
151156716

[1,1,1,2,3,8,15,43,110,370,1260,5366,25684,154104,
 1156716]