Fifth column of triangle A055252.

Terms

a(0) =1a(1) =8a(2) =39a(3) =150a(4) =501a(5) =1524a(6) =4339a(7) =11762a(8) =30705a(9) =77808a(10) =192495a(11) =466926a(12) =1114093a(13) =2621420a(14) =6094827a(15) =14024682a(16) =31981545a(17) =72351720a(18) =162529255a(19) =362807270a(20) =805306341a(21) =1778384868a(22) =3909091299a(23) =8556380130a(24) =18656264161a(25) =40533753824