nag_dgtsvx (f07cbc) Example Program Data
  5     2                      : n and nrhs
        2.1  -1.0   1.9   8.0
  3.0   2.3  -5.0  -0.9   7.1
  3.4   3.6   7.0  -6.0        : matrix A (super, main, sub)-diags
  2.7   6.6
 -0.5  10.8
  2.6  -3.2
  0.6 -11.2
  2.7  19.1                    : matrix B