Odd composite numbers k such that Sum_{i=1..k-1} 2^i * i^(k-2) == Sum_{i=1..(k-1)/2} i^(k-2) (mod k).

A373734

Odd composite numbers k such that Sum_{i=1..k-1} 2^i * i^(k-2) == Sum_{i=1..(k-1)/2} i^(k-2) (mod k).

Terms

    a(0) =49a(1) =111a(2) =343a(3) =561a(4) =637a(5) =905a(6) =1105a(7) =1519a(8) =1729a(9) =2465a(10) =2613a(11) =2821a(12) =4017a(13) =6517a(14) =6601a(15) =8029a(16) =8911a(17) =10585a(18) =10621a(19) =11973a(20) =15841a(21) =20091a(22) =20301a(23) =29341a(24) =41041a(25) =46657a(26) =47677a(27) =52633a(28) =54145a(29) =62745

External references