Number of solutions to x^2 - x + 1 == 0 (mod n).

A000086

Number of solutions to x^2 - x + 1 == 0 (mod n).

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =0a(6) =2a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =2a(13) =0a(14) =0a(15) =0a(16) =0a(17) =0a(18) =2a(19) =0a(20) =2a(21) =0a(22) =0a(23) =0a(24) =0a(25) =0a(26) =0a(27) =0a(28) =0a(29) =0

External references