A279647 Irregular triangle read by rows: possible numbers of the diagonals of an n-faced convex polyhedron.

0, 0, 0, 1, 2, 4, 0, 2, 3, 4, 5, 6, 7, 9, 10, 0, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 0, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34

Offset: 4

Author

Vladimir Letsko, Dec 16 2016

Keywords

• nonn
• tabf
• more

Examples

			Triangle begins:
4 | 0;
5 | 0;
6 | 0, 1, 2, 4;
7 | 0, 2, 3, 4, 5, 6, 7,  9, 10;
8 | 0, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20;
		

Crossrefs

Cf. A279015, A279019, A279022, A279620, A279679, A279681.