A394863 Number of chiral pairs of polyominoes with n octagonal cells of the hyperbolic regular tiling with Schläfli symbol {8,8}.

0, 0, 0, 0, 14, 149, 1848, 22540, 289692, 3840172, 52443110, 733241659, 10458016049, 151675470775

Offset

0,5

Comments

Each member of a chiral pair is a reflection but not a rotation of the other.

Links

Table of n, a(n) for n=0..13.

Formula

a(n) = A394862(n) - A393744(n) = (A394862(n) - A394864(n)) / 2 = A393744(n) - A394864(n).

Crossrefs

Cf. A394862 (oriented), A393744 (unoriented), A394864 (achiral), A389938 {8,oo}.

Sequence in context: A067103 A081184 A032343 * A389938 A222614 A019521

Adjacent sequences: A394860 A394861 A394862 * A394864 A394865 A394866

Keyword

nonn,hard,more

Author

Robert A. Russell, Apr 04 2026

Status

approved