A279679 Irregular triangle read by rows: possible numbers of diagonals of an n-edged convex polyhedron.

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

Author

Vladimir Letsko, Dec 16 2016

Keywords

• nonn
• tabf

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

Cf. A279015, A279019, A279022, A279620, A279647, A279681.