Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of (floor[(i+1)/2] if i=j and = 0 otherwise), as in A204162.

A204163

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of (floor[(i+1)/2] if i=j and = 0 otherwise), as in A204162.

Terms

    a(0) =1a(1) =-1a(2) =0a(3) =-2a(4) =1a(5) =0a(6) =-2a(7) =4a(8) =-1a(9) =0a(10) =-2a(11) =7a(12) =-6a(13) =1a(14) =0a(15) =-4a(16) =17a(17) =-21a(18) =9a(19) =-1a(20) =0a(21) =-8a(22) =40a(23) =-64a(24) =43a(25) =-12a(26) =1a(27) =0a(28) =-24a(29) =132

External references