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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”).

A038174 as a simple table

na(n)
11
21
34
425
5210
62209
724651
8284768
93360995
1040328652
11490455189

[1,1,4,25,210,2209,24651,284768,3360995,40328652,
 490455189]