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A279679
Irregular triangle read by rows: possible numbers of diagonals of an n-edged convex polyhedron.
2
0, 0, 0, 1, 0, 1, 1, 2, 0, 2, 3, 4, 2, 3, 4, 5, 0, 3, 4, 5, 6, 7, 3, 4, 5, 6, 7, 8, 9, 10, 0, 4, 6, 7, 8, 9, 10, 11, 12, 13, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
OFFSET
6,8
COMMENTS
The beginning of the irregular triangle is:
6 | 0;
7 | -
8 | 0;
9 | 0, 1;
10 | 0, 1;
11 | 1, 2;
12 | 0, 2, 3, 4;
13 | 2, 3, 4, 5;
14 | 0, 3, 4, 5, 6, 7;
15 | 3, 4, 5, 6, 7, 8, 9, 10;
16 | 0, 4, 6, 7, 8, 9, 10, 11, 12, 13;
17 | 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16;
18 | 0, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20;
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Vladimir Letsko, Dec 16 2016
STATUS
approved