Diagonal sums of triangle A185384.

Terms

a(0) =1a(1) =2a(2) =6a(3) =19a(4) =60a(5) =188a(6) =589a(7) =1846a(8) =5786a(9) =18135a(10) =56840a(11) =178152a(12) =558377a(13) =1750106a(14) =5485310a(15) =17192459a(16) =53885860a(17) =168892996a(18) =529356757a(19) =1659148590a(20) =5200224626a(21) =16298923631a(22) =51085276240a(23) =160115201936a(24) =501844754065