Number of fixed triangular polyominoes with 2n cells of the regular tiling with Schläfli symbol {3,6} that have a common axis of symmetry coincident with cell edges.
A364485
Number of fixed triangular polyominoes with 2n cells of the regular tiling with Schläfli symbol {3,6} that have a common axis of symmetry coincident with cell edges.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =9a(4) =23a(5) =59a(6) =155a(7) =418a(8) =1136a(9) =3122a(10) =8663a(11) =24201a(12) =68059a(13) =192471a(14) =546899a(15) =1560511a(16) =4469000a(17) =12839642a(18) =36995629a(19) =106875531a(20) =309477998a(21) =898075778a(22) =2611239508a(23) =7606064348a(24) =22191694916a(25) =64845964156a(26) =189752911736a(27) =555985221037
External references
- oeis: A364485