Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of min{3i+j-3,i+3j-3} (A204012).

A204013

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of min{3i+j-3,i+3j-3} (A204012).

Terms

    a(0) =1a(1) =-1a(2) =1a(3) =-6a(4) =1a(5) =0a(6) =-10a(7) =15a(8) =-1a(9) =-4a(10) =-8a(11) =40a(12) =-28a(13) =1a(14) =-16a(15) =24a(16) =56a(17) =-110a(18) =45a(19) =-1a(20) =-48a(21) =160a(22) =-72a(23) =-224a(24) =245a(25) =-66a(26) =1a(27) =-128a(28) =608a(29) =-880

External references