A107297 Limit of the string substitution 1->{1, 3, 1, 1}, 2->{1}, 3->{2}.

1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 2, 1, 3

Offset: 1

Author

Roger L. Bagula, May 20 2005

Keywords

• nonn

Crossrefs

Cf. A106748, A106749.

Programs

Mathematica

s[1] = {1, 3, 1, 1}; s[2] = {1}; s[3] = {2};
t[a_] := Flatten[s /@ a];
p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]]
aa = p[5]

Extensions

Edited by and meaningful name from Joerg Arndt, Jun 30 2023