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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”).

A056681 as a simple table

na(n)
11
23
310
427
554
693
7474
82079
94834
105844
1112337
1220193
1349528
1456988
1571545
1677308

[1,3,10,27,54,93,474,2079,4834,5844,12337,20193,
 49528,56988,71545,77308]