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

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =6a(6) =8a(7) =27a(8) =30a(9) =59a(10) =64a(11) =147a(12) =128a(13) =212a(14) =265a(15) =380a(16) =347a(17) =623a(18) =512a(19) =897a(20) =882a(21) =1074a(22) =1000a(23) =1863a(24) =1437a(25) =1907a(26) =2100a(27) =2767a(28) =2204a(29) =3916