Number of distinct solutions of sum{i=1..9}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 2..n-2.
A180832
Number of distinct solutions of sum{i=1..9}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 2..n-2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =15a(5) =263a(6) =6946a(7) =95702a(8) =1113010a(9) =9143911a(10) =64448228a(11) =363369141a(12) =1820591529a(13) =7808981077a(14) =30658462967a(15) =107320405217a(16) =351179673988
External references
- oeis: A180832