Numbers k such that Fib(k) == 21 (mod k).

Terms

a(0) =1a(1) =2a(2) =8a(3) =56a(4) =152a(5) =248a(6) =488a(7) =632a(8) =638a(9) =872a(10) =1112a(11) =1178a(12) =1208a(13) =1448a(14) =1592a(15) =1688a(16) =1832a(17) =1928a(18) =2168a(19) =2648a(20) =2792a(21) =3032a(22) =3272a(23) =3368a(24) =3512a(25) =3536a(26) =3608a(27) =3992a(28) =4148a(29) =4328