Numbers k such that the k-th Fibonacci number is composite and the concatenation of its prime factors (written in base 10 in ascending order) is prime.

A038524

Numbers k such that the k-th Fibonacci number is composite and the concatenation of its prime factors (written in base 10 in ascending order) is prime.

Terms

    a(0) =8a(1) =24a(2) =28a(3) =34a(4) =50a(5) =52a(6) =58a(7) =71a(8) =77a(9) =163a(10) =197a(11) =235a(12) =238a(13) =319a(14) =570a(15) =669a(16) =949a(17) =958a(18) =1211a(19) =1305

External references