Number of distinct solutions of Sum_{i=1..6} x(2*i-1)*x(2*i) = 1 (mod n), with x() only in 1..n-1.
A180788
Number of distinct solutions of Sum_{i=1..6} x(2*i-1)*x(2*i) = 1 (mod n), with x() only in 1..n-1.
Terms
- a(0) =0a(1) =0a(2) =9a(3) =112a(4) =1004a(5) =6404a(6) =32890a(7) =137528a(8) =499641a(9) =1579113a(10) =4551268a(11) =11861187a(12) =29034355a(13) =65777365a(14) =142805210a(15) =291148080a(16) =576393509a(17) =1082580072a(18) =1993354411a(19) =3505999065a(20) =6088877416a(21) =10148269838a(22) =16796812567a(23) =26776385524a(24) =42563703291a(25) =65334374820a(26) =100365357222a(27) =149190253465
External references
- oeis: A180788