Column 2 of triangle A258829.

Terms

a(0) =1a(1) =2a(2) =11a(3) =38a(4) =263a(5) =1260a(6) =10871a(7) =66576a(8) =694599a(9) =5182960a(10) =63738259a(11) =561098224a(12) =7969169739a(13) =80865956192