OFFSET
0,3
COMMENTS
This substitution was suggested by looking at the Kenyon border tiling substitutions.
LINKS
MATHEMATICA
s[n_] := n /. {1 -> 2, 2 -> 3, 3 -> {2, 1}}; t[a_] := Join[a, Flatten[s /@ a]]; Flatten[ NestList[t, {1}, 6]]
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Roger L. Bagula, Apr 02 2005
STATUS
approved