def _get_al_mohy_higham_2012_experiment_1():
A = np.array([<EOL>[<NUM_LIT>, <NUM_LIT>, <NUM_LIT>, <NUM_LIT>],<EOL>[<NUM_LIT:0>, <NUM_LIT>, <NUM_LIT>, <NUM_LIT>],<EOL>[<NUM_LIT:0>, <NUM_LIT:0>, <NUM_LIT>, <NUM_LIT>],<EOL>[<NUM_LIT:0>, <NUM_LIT:0>, <NUM_LIT:0>, <NUM_LIT>]], dtype=float)<EOL>return A<EOL>
Return the test matrix from Experiment (1) of [1]_.

References
----------
.. [1] Awad H. Al-Mohy and Nicholas J. Higham (2012)
       "Improved Inverse Scaling and Squaring Algorithms
       for the Matrix Logarithm."
       SIAM Journal on Scientific Computing, 34 (4). C152-C169.
       ISSN 1095-7197