A modified Engel expansion for 4*sqrt(2) - 5.

Terms

a(0) =2a(1) =4a(2) =6a(3) =2a(4) =18a(5) =34a(6) =2a(7) =578a(8) =1154a(9) =2a(10) =665858a(11) =1331714a(12) =2a(13) =886731088898a(15) =2a(18) =2