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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”).

A037297 as a simple table

na(n)
15
290
31677
428435
5425803
66084393

[5,90,1677,28435,425803,6084393]