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A106147
Image of 1 under the repeated morphism 1 -> 21, 2 -> 32, 3 -> 43, 4 -> 14.
0
1, 4, 4, 3, 4, 3, 3, 2, 4, 3, 3, 2, 3, 2, 2, 1, 4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 4, 4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 4, 3, 2, 2, 1, 2, 1, 1, 4, 2, 1, 1, 4, 1, 4, 4, 3, 4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 4, 3, 2, 2, 1, 2, 1, 1, 4, 2, 1, 1, 4, 1, 4, 4, 3, 3, 2, 2, 1, 2, 1, 1, 4, 2, 1, 1, 4, 1, 4, 4, 3, 2, 1, 1
OFFSET
0,2
LINKS
F. M. Dekking, Recurrent Sets, Advances in Mathematics, vol. 44, no.1, April 1982, page 85, section 4.1.
MATHEMATICA
s[1] = {2, 1};
s[2] = {3, 2};
s[3] = {4, 3};
s[4] = {1, 4};
t[a_] := Flatten[s /@ a];
p[0] = {1};
p[1] = t[p[0]];
p[n_] := t[p[n - 1]]
aa = p[8]
CROSSREFS
Sequence in context: A020805 A200587 A307836 * A202393 A073321 A055620
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, May 07 2005
EXTENSIONS
Edited and new name from Joerg Arndt, Jun 25 2022
STATUS
approved