T(n,k)=number of distinct solutions to sum{i=1..k}(x(2i-1)*x(2i)) == 0 (mod n), with x() in 0..n-1.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =3a(6) =1a(7) =6a(8) =8a(9) =5a(10) =1a(11) =9a(12) =21a(13) =20a(14) =5a(15) =1a(16) =12a(17) =45a(18) =68a(19) =28a(20) =8a(21) =1a(22) =16a(23) =87a(24) =205a(25) =142a(26) =56a(27) =7a(28) =1a(29) =20