digraph "sigma odd" {
  size="7, 10";
  margin="0";
  ranksep=".2";
  nodesep=".2";
  rankdir="LR";
  ratio="fill";

  1 -> 1;
  2 -> 1;
  3 -> 4;
  4 -> 1;
  5 -> 6;
  6 -> 4;
  7 -> 8;
  8 -> 1;
  9 -> 13;
  10 -> 6;
  11 -> 12;
  12 -> 4;
  13 -> 14;
  14 -> 8;
  15 -> 24;
  16 -> 1;
  17 -> 18;
  18 -> 13;
  19 -> 20;
  20 -> 6;
  21 -> 32;
  22 -> 12;
  23 -> 24;
  24 -> 4;
  25 -> 31;
  26 -> 14;
  27 -> 40;
  28 -> 8;
  29 -> 30;
  30 -> 24;
  31 -> 32;
  32 -> 1;
  33 -> 48;
  34 -> 18;
  35 -> 48;
  36 -> 13;
  37 -> 38;
  38 -> 20;
  39 -> 56;
  40 -> 6;
  41 -> 42;
  42 -> 32;
  43 -> 44;
  44 -> 12;
  45 -> 78;
  46 -> 24;
  47 -> 48;
  48 -> 4;
  49 -> 57;
  50 -> 31;
  56 -> 8;
  57 -> 80;
  78 -> 56;
  80 -> 6;
}