Triangle of coefficients of characteristic polynomials of anti-symmetrical tridiagonal matrices: Middle diagonal: a=1; Lower first subdiagonal: b=2; Upper first subdiagonal: c=-2; Example: M(3) {{1, -2, 0}, {2, 1, -2}, {0, 2, 1}}.
A136643
Triangle of coefficients of characteristic polynomials of anti-symmetrical tridiagonal matrices: Middle diagonal: a=1; Lower first subdiagonal: b=2; Upper first subdiagonal: c=-2; Example: M(3) {{1, -2, 0}, {2, 1, -2}, {0, 2, 1}}.
Terms
- a(0) =1a(1) =1a(2) =-1a(3) =5a(4) =-2a(5) =1a(6) =9a(7) =-11a(8) =3a(9) =-1a(10) =29a(11) =-28a(12) =18a(13) =-4a(14) =1a(15) =65a(16) =-101a(17) =58a(18) =-26a(19) =5a(20) =-1a(21) =181a(22) =-278a(23) =231a(24) =-100a(25) =35a(26) =-6a(27) =1a(28) =441a(29) =-863
External references
- oeis: A136643