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

4,5

Links

Table of n, a(n) for n=4..66.

Example

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.

Sequence in context: A011165 A188672 A228518 * A028963 A004516 A281499

Adjacent sequences: A279644 A279645 A279646 * A279648 A279649 A279650

Keyword

nonn,tabf,more

Author

Vladimir Letsko, Dec 16 2016

Status

approved