Triangle read by rows: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of min(2i-1,2j-1) (A157454).

A204021

Triangle read by rows: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of min(2i-1,2j-1) (A157454).

Terms

    a(0) =1a(1) =1a(2) =-1a(3) =2a(4) =-4a(5) =1a(6) =4a(7) =-12a(8) =9a(9) =-1a(10) =8a(11) =-32a(12) =40a(13) =-16a(14) =1a(15) =16a(16) =-80a(17) =140a(18) =-100a(19) =25a(20) =-1a(21) =32a(22) =-192a(23) =432a(24) =-448a(25) =210a(26) =-36a(27) =1a(28) =64a(29) =-448

External references