Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 1 (mod n), with x() in 0..n-1.

A180807

Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 1 (mod n), with x() in 0..n-1.

Terms

    a(0) =0a(1) =9a(2) =84a(3) =474a(4) =2325a(5) =8468a(6) =28778a(7) =79670a(8) =212049a(9) =484180a(10) =1100299a(11) =2210931a(12) =4457004a(13) =8097649a(14) =15007266a(15) =25353330a(16) =43846972a(17) =69637926a(18) =114422914a(19) =173562451a(20) =272208103a(21) =396802048a(22) =601571401a(23) =847452462a(24) =1246173200a(25) =1706973960

External references