Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of gcd(i,j) (A003989).
A204025
Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of gcd(i,j) (A003989).
Terms
- a(0) =1a(1) =-1a(2) =1a(3) =-3a(4) =1a(5) =2a(6) =-8a(7) =6a(8) =-1a(9) =4a(10) =-20a(11) =26a(12) =-10a(13) =1a(14) =16a(15) =-88a(16) =134a(17) =-72a(18) =15a(19) =-1a(20) =32a(21) =-240a(22) =496a(23) =-408a(24) =143a(25) =-21a(26) =1a(27) =192a(28) =-1504a(29) =3352
External references
- oeis: A204025