A column and diagonal of A060187.

Terms

a(0) =1a(1) =6a(2) =23a(3) =76a(4) =237a(5) =722a(6) =2179a(7) =6552a(8) =19673a(9) =59038a(10) =177135a(11) =531428a(12) =1594309a(13) =4782954a(14) =14348891a(15) =43046704a(16) =129140145a(17) =387420470a(18) =1162261447a(19) =3486784380a(20) =10460353181a(21) =31381059586a(22) =94143178803a(23) =282429536456a(24) =847288609417