Number of distinct solutions of Sum_{i=1..6}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2.
A180818
Number of distinct solutions of Sum_{i=1..6}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =4a(5) =102a(6) =715a(7) =5509a(8) =25718a(9) =118806a(10) =408760a(11) =1398428a(12) =3851116a(13) =10645021a(14) =25222196a(15) =59980990a(16) =125991239a(17) =269061589a(18) =515720413a(19) =1009271512a(20) =1807435081a(21) =3294073002a(22) =5559159180a(23) =9631372495a(24) =15454550858a(25) =25498951485a(26) =39499016193
External references
- oeis: A180818