#nexus
[This file provided by Paul Lewis, from the NCL test suite. ]

begin taxa;
  dimensions ntax=8;
  taxlabels taxon_1 taxon_2 taxon_3 taxon_4 taxon_5 taxon_6 taxon_7 taxon_8;
end;

[!
***************************************************
* Non-interleaved, lower-triangular, no diagonals *
***************************************************
]
begin distances;
  format nodiagonal;
  matrix
    taxon_1
    taxon_2    1
    taxon_3    2   3
    taxon_4    4   5   6
    taxon_5    7   8   9  10
    taxon_6   11  12  13  14  15
    taxon_7   16  17  18  19  20  21
    taxon_8   22  23  24  25  26  27  28;
end;
