Index of smallest Fibonacci number beginning with the n-th Fibonacci number other than itself.

Terms

a(0) =7a(1) =7a(2) =8a(3) =9a(4) =10a(5) =11a(6) =31a(7) =32a(8) =76a(9) =77a(10) =78a(11) =79a(12) =525a(13) =1416a(14) =1417a(15) =1863a(16) =1864a(17) =6004a(18) =6005a(19) =6006a(20) =6007a(21) =6008a(22) =6009a(23) =70009a(24) =70010a(25) =70011a(26) =3853341a(27) =8668488a(28) =11420001a(29) =13139697