Fibonacci sequence beginning 4, 11.

Terms

a(0) =4a(1) =11a(2) =15a(3) =26a(4) =41a(5) =67a(6) =108a(7) =175a(8) =283a(9) =458a(10) =741a(11) =1199a(12) =1940a(13) =3139a(14) =5079a(15) =8218a(16) =13297a(17) =21515a(18) =34812a(19) =56327a(20) =91139a(21) =147466a(22) =238605a(23) =386071a(24) =624676a(25) =1010747a(26) =1635423a(27) =2646170a(28) =4281593a(29) =6927763