Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(2k+1)-1.

Terms

a(0) =323a(1) =377a(2) =3827a(3) =5777a(4) =6479a(5) =10877a(6) =11663a(7) =18407a(8) =19043a(9) =20999a(10) =23407a(11) =25877a(12) =27323a(13) =34943a(14) =35207a(15) =39203a(16) =44099a(17) =47519a(18) =50183a(19) =51983a(20) =53663a(21) =60377a(22) =65471a(23) =75077a(24) =78089a(25) =79547a(26) =80189a(27) =81719a(28) =82983a(29) =84279