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

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =9a(5) =19a(6) =31a(7) =42a(8) =75a(9) =91a(10) =136a(11) =160a(12) =232a(13) =254a(14) =364a(15) =388a(16) =542a(17) =525a(18) =767a(19) =754a(20) =1015a(21) =993a(22) =1389a(23) =1256a(24) =1795a(25) =1641a(26) =2169a(27) =2080a(28) =2838a(29) =2344