A394863 - OEIS

%I #11 Apr 05 2026 13:16:05

%S 0,0,0,0,14,149,1848,22540,289692,3840172,52443110,733241659,

%T 10458016049,151675470775

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

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

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

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

%K nonn,hard,more

%O 0,5

%A _Robert A. Russell_, Apr 04 2026