Fibonacci sequence beginning 4, 26.

Terms

a(0) =4a(1) =26a(2) =30a(3) =56a(4) =86a(5) =142a(6) =228a(7) =370a(8) =598a(9) =968a(10) =1566a(11) =2534a(12) =4100a(13) =6634a(14) =10734a(15) =17368a(16) =28102a(17) =45470a(18) =73572a(19) =119042a(20) =192614a(21) =311656a(22) =504270a(23) =815926a(24) =1320196a(25) =2136122a(26) =3456318a(27) =5592440a(28) =9048758a(29) =14641198