Number of distinct solutions of sum{i=1..6}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 1..n-1.
A180777
Number of distinct solutions of sum{i=1..6}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 1..n-1.
Terms
- a(0) =0a(1) =1a(2) =12a(3) =118a(4) =995a(5) =6518a(6) =32893a(7) =139369a(8) =499659a(9) =1599064a(10) =4551225a(11) =12014040a(12) =29034510a(13) =66658219a(14) =142828285a(15) =295240250a(16) =576393604a(17) =1098913338a(18) =1993354080a(19) =3560486370a(20) =6091808112a(21) =10312711744a(22) =16796812703a(23) =27247744649a(24) =42564714900
External references
- oeis: A180777