a(n) = A078153(2^n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =8a(4) =24a(5) =73a(6) =183a(7) =470a(8) =1112a(9) =2592a(10) =5876a(11) =13233a(12) =29316a(13) =64329a(14) =140028a(15) =302824a(16) =651101a(17) =1393204a(18) =2968129a(19) =6300084a(20) =13326815a(21) =28108564a(22) =59123162a(23) =124065274a(24) =259759346a(25) =542781169a(26) =1132075405a(27) =2357197804a(28) =4900443545a(29) =10173068455