Number of distinct solutions of sum{i=1..8}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.

A180790

Number of distinct solutions of sum{i=1..8}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.

Terms

    a(0) =0a(1) =0a(2) =12a(3) =318a(4) =4868a(5) =53133a(6) =444019a(7) =2935676a(8) =16112283a(9) =75118525a(10) =307372602a(11) =1118328968a(12) =3701885454a(13) =11222027568a(14) =31699803817a(15) =83633494240a(16) =209004408969a(17) =494557127475

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