Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of {|i-j}, (A049581).
A203993
Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of {|i-j}, (A049581).
Terms
- a(0) =0a(1) =-1a(2) =-1a(3) =0a(4) =1a(5) =4a(6) =6a(7) =0a(8) =-1a(9) =-12a(10) =-32a(11) =-20a(12) =0a(13) =1a(14) =32a(15) =120a(16) =140a(17) =50a(18) =0a(19) =-1a(20) =-80a(21) =-384a(22) =-648a(23) =-448a(24) =-105a(25) =0a(26) =1a(27) =192a(28) =1120a(29) =2464
External references
- oeis: A203993