The cost of all leaves in the Fibonacci tree of order n.

Terms

a(0) =0a(1) =0a(2) =3a(3) =7a(4) =17a(5) =35a(6) =70a(7) =134a(8) =251a(9) =461a(10) =835a(11) =1495a(12) =2652a(13) =4668a(14) =8163a(15) =14195a(16) =24565a(17) =42331a(18) =72674a(19) =124354a(20) =212155a(21) =360985a(22) =612743a(23) =1037807a(24) =1754232a(25) =2959800a(26) =4985475a(27) =8384479a(28) =14080601a(29) =23614931