Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j) = gcd(i+1, j+1) (A204030).

A204111

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j) = gcd(i+1, j+1) (A204030).

Terms

    a(0) =2a(1) =-1a(2) =5a(3) =-5a(4) =1a(5) =10a(6) =-20a(7) =9a(8) =-1a(9) =44a(10) =-100a(11) =62a(12) =-14a(13) =1a(14) =104a(15) =-328a(16) =330a(17) =-128a(18) =20a(19) =-1a(20) =656a(21) =-2208a(22) =2476a(23) =-1176a(24) =263a(25) =-27a(26) =1a(27) =2624a(28) =-10144a(29) =13992

External references