Number of achiral polyominoes with n heptagonal cells of the hyperbolic regular tiling with Schläfli symbol {7,oo}.

A389563

Number of achiral polyominoes with n heptagonal cells of the hyperbolic regular tiling with Schläfli symbol {7,oo}.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =21a(6) =51a(7) =190a(8) =506a(9) =1950a(10) =5481a(11) =21576a(12) =62832a(13) =250971a(14) =749398a(15) =3025308a(16) =9203634a(17) =37456650a(18) =115607310a(19) =473498025a(20) =1478314266a(21) =6085977381a(22) =19180049928a(23) =79296104784a(24) =251857119696

External references