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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”).

A207153 as a simple table

na(n)
11
27
318
4120
52029
632882
71141849
874280156
96765095095

[1,7,18,120,2029,32882,1141849,74280156,
 6765095095]