Numbers n such that 2 * (1^n + 2^n + 3^n + ... + n^n) is not 0 (mod n), but 2 * (1^d + 2^d + 3^d + ... + d^d) is 0 (mod d) for each other d | n.
A280187
Numbers n such that 2 * (1^n + 2^n + 3^n + ... + n^n) is not 0 (mod n), but 2 * (1^d + 2^d + 3^d + ... + d^d) is 0 (mod d) for each other d | n.
Terms
- a(0) =6a(1) =20a(2) =110a(3) =272a(4) =506a(5) =812a(6) =2162a(7) =2756a(8) =3422a(9) =4970a(10) =6806a(11) =7832a(12) =11342a(13) =12656a(14) =17030a(15) =18632a(16) =22052a(17) =27722a(18) =29756a(19) =31862a(20) =36290a(21) =38612a(22) =51302a(23) =54056a(24) =56882a(25) =62750a(26) =65792a(27) =68906a(28) =72092a(29) =85556
External references
- oeis: A280187