Start with the hexagonal tile of the Shield tiling and recursively apply the substitution rule. a(n) is the number of hexagonal tiles after n iterations.
A298678
Start with the hexagonal tile of the Shield tiling and recursively apply the substitution rule. a(n) is the number of hexagonal tiles after n iterations.
Terms
- a(0) =1a(1) =0a(2) =7a(3) =12a(4) =73a(5) =216a(6) =919a(7) =3204a(8) =12409a(9) =45408a(10) =171271a(11) =635580a(12) =2379241a(13) =8865000a(14) =33113527a(15) =123523572a(16) =461111833a(17) =1720661616a(18) =6422058919a(19) =23966525484a(20) =89446140169a(21) =333813840888
External references
- oeis: A298678