For example, the number 5 could be decomposed as:
5
41
14
32
23
311
131
113
221
212
122
2111
1211
1121
1112
11111
If we identify every decomposition with its obverse, we obtain:
5
41
32
311
131
221
212
2111
1211
11111
The bicompositions of the number 5 are:
221
212
122
2111
1211
1121
1112
11111
If we identify every bicomposition with its obverse, we obtain:
221
212
2111
1211
11111
Among them, the symmetrical bicompositions are:
212
11111
The decompositions not beginning by 1:
5
41
32
23
311
221
212
2111
The decompositions not beginning by 1, identified with their obverses:
5
41
32
311
221
212
2111
The bicompositions not beginning by 1:
221
212
2111
The bicompositions not beginning by 1, identified with their obverses:
212