Numbers k such that 5*k+1 divides 5^k+1.

Terms

a(0) =0a(1) =1a(2) =625a(3) =57057a(4) =7748433a(5) =30850281a(6) =111494625a(7) =393423745a(8) =499088601a(9) =519341361a(10) =1051107705a(11) =1329416385a(12) =1616038425a(13) =2215448001a(14) =2433936225a(15) =2852972265a(16) =3399207273a(17) =4344683849a(18) =4961725281a(19) =5454760185a(20) =5485530369a(21) =6578054145a(22) =6678031745a(23) =7701979761a(24) =7807302825