A Chebyshev-related transform of the Jacobsthal numbers.

Terms

a(0) =0a(1) =1a(2) =1a(3) =5a(4) =8a(5) =26a(6) =52a(7) =143a(8) =317a(9) =811a(10) =1884a(11) =4668a(12) =11076a(13) =27053a(14) =64805a(15) =157273a(16) =378364a(17) =915598a(18) =2206976a(19) =5333731a(20) =12867673a(21) =31080023a(22) =75010008a(23) =181128696a(24) =437221032a(25) =1055645785a(26) =2548391209a(27) =6152624621a(28) =14853322640a(29) =35859784130