Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of floor[(i+j)/2], as in A204164.
A204165
Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of floor[(i+j)/2], as in A204164.
Terms
- a(0) =1a(1) =-1a(2) =1a(3) =-3a(4) =1a(5) =-1a(6) =-2a(7) =6a(8) =-1a(9) =0a(10) =4a(11) =4a(12) =-10a(13) =1a(14) =0a(15) =0a(16) =-15a(17) =-4a(18) =15a(19) =-1a(20) =0a(21) =0a(22) =0a(23) =36a(24) =3a(25) =-21a(26) =1a(27) =0a(28) =0a(29) =0
External references
- oeis: A204165