Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.
A127407
Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.
Terms
- a(0) =3a(1) =15a(2) =44a(3) =100a(4) =195a(5) =343a(6) =560a(7) =864a(8) =1275a(9) =1815a(10) =2508a(11) =3380a(12) =4459a(13) =5775a(14) =7360a(15) =9248a(16) =11475a(17) =14079a(18) =17100a(19) =20580a(20) =24563a(21) =29095a(22) =34224a(23) =40000a(24) =46475a(25) =53703a(26) =61740a(27) =70644a(28) =80475a(29) =91295
External references
- oeis: A127407