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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”).

A208823 as a simple table

na(n)
11
27
325
4210
51755
617339
7177097
81888153
920587627
10228891069
112582512649
1229499246456

[1,7,25,210,1755,17339,177097,1888153,20587627,
 228891069,2582512649,29499246456]