Z-sequence for the Riordan triangle A125166.

Terms

a(0) =8a(1) =-37a(2) =181a(3) =-865a(4) =4105a(5) =-19441a(6) =92017a(7) =-435457a(8) =2060641a(9) =-9751105a(10) =46142785a(11) =-218350081a(12) =1033243777a(13) =-4889362177a(14) =23136710401a(15) =-109484089345a(16) =518084273665