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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”).

A167590 as a simple table

na(n)
11
23
320
4128
51269
613019
7179816
82561280
945580073
10831425459
1118116729724
12402900613376
1310389410535965

[1,3,20,128,1269,13019,179816,2561280,45580073,
 831425459,18116729724,402900613376,10389410535965]