Distances 9

#nexus

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

[!
********************************************
* Interleaved, upper-triangular, diagonals *
********************************************
]
begin distances;
  format triangle=upper interleave;
  matrix
    taxon_1   0  1  2
    taxon_2      0  8
    taxon_3         0

    taxon_1   3   4
    taxon_2   9  10
    taxon_3  14  15
    taxon_4   0  19
    taxon_5       0

    taxon_1   5   6   7
    taxon_2  11  12  13
    taxon_3  16  17  18
    taxon_4  20  21  22
    taxon_5  23  24  25
    taxon_6   0  26  27
    taxon_7       0  28
    taxon_8           0;
end;