login
A106748
Define the morphism f: 1->113, 2->13, 3->2 and let a(0) = 1; then a(n+1) = f(a(n)).
6
1, 113, 1131132, 1131132113113213, 113113211311321311311321131132131132, 113113211311321311311321131132131132113113211311321311311321131132131132113113213
OFFSET
0,2
REFERENCES
E. Bombieri and J. Taylor, Which distribution of matter diffracts? An initial investigation, in International Workshop on Aperiodic Crystals (Les Houches, 1986), J. de Physique, Colloq. C3, 47 (1986), C3-19 to C3-28.
MATHEMATICA
FromDigits /@ NestList[ Flatten[ # /. {1 -> {1, 1, 3}, 2 -> {1, 3}, 3 -> 2}] &, {1}, 5] (* Robert G. Wilson v, May 17 2005 *)
CROSSREFS
Cf. A106749.
Sequence in context: A329105 A304324 A180052 * A220983 A122503 A076150
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 16 2005
EXTENSIONS
More terms from Robert G. Wilson v, May 17 2005
STATUS
approved