T(n,k)=number of distinct solutions of sum{i=1..k}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.
A180793
T(n,k)=number of distinct solutions of sum{i=1..k}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =0a(4) =0a(5) =2a(6) =0a(7) =1a(8) =1a(9) =2a(10) =0a(11) =0a(12) =3a(13) =4a(14) =3a(15) =0a(16) =1a(17) =7a(18) =14a(19) =9a(20) =2a(21) =0a(22) =0a(23) =5a(24) =30a(25) =46a(26) =19a(27) =4a(28) =0a(29) =1
External references
- oeis: A180793