A288181 Occurrence counts of chambers with maximum number of vertices in the chamber complex of an n X m lattice polygon as described in A288177, written as triangle T(n,m), n >= 1, 1 <= m <= n.

4, 2, 8, 14, 54, 168

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Hugo Pfoertner, Chamber complex of 5 X 5 lattice polygon. Illustration.

Hugo Pfoertner, Chamber complex of 7 X 5 lattice polygon. Illustration.

Hugo Pfoertner, Chamber complex of 9 X 5 lattice polygon. Illustration.

Example

The chamber complex of the 5 X 5 lattice polygon has 16 chambers of size 6, so T(5,5)=16, taken from illustration on Pfetsch and Ziegler web page, see link in A288177.

Crossrefs

Cf. A288177, A288187.

Sequence in context: A002291 A225872 A231777 * A110622 A130078 A230900

Adjacent sequences: A288178 A288179 A288180 * A288182 A288183 A288184

Keyword

nonn,tabl,more

Author

Hugo Pfoertner, Jun 06 2017

Status

approved