Ceiling((Pi+e)^n).

Terms

a(0) =6a(1) =35a(2) =202a(3) =1180a(4) =6910a(5) =40489a(6) =237257a(7) =1390294a(8) =8146946a(9) =47740080a(10) =279750873a(11) =1639304998a(12) =9606121524a(13) =56290666386a(14) =329856239533