An n-celled polyhex with perimeter p has (6n+p)/2 edges. The maximum number of edges in an n-celled polyhex is 5n+1.
Table of n, a(n) for n=1..32.
Isoperimetrical Polyhexes at Poly Pages
Cf. A000228: Number of hexagonal polyominoes (or planar polyhexes) with n cells. A057779: Hexagonal polyominoes (or polyhexes, A000228) with perimeter 2n. A038142: Number of planar cata-polyhexes with n cells.
Sequence in context: A035671 A190164 A253938 * A230595 A130731 A287240
Adjacent sequences: A131485 A131486 A131487 * A131489 A131490 A131491
Tanya Khovanova, Jul 28 2007