Negative value of coefficient of x^(n-4) in the characteristic polynomial of a certain n X n integer circulant matrix.
A127409
Negative value of coefficient of x^(n-4) in the characteristic polynomial of a certain n X n integer circulant matrix.
Terms
- a(0) =160a(1) =1750a(2) =10044a(3) =40817a(4) =132608a(5) =367416a(6) =903000a(7) =2020458a(8) =4191264a(9) =8168446a(10) =15107092a(11) =26719875a(12) =45473792a(13) =74834816a(14) =119567664a(15) =186098388a(16) =282948000a(17) =421245846a(18) =615331948a(19) =883458037a(20) =1248597504a(21) =1739375000a(22) =2391126920
External references
- oeis: A127409