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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..114.

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

Adjacent sequences:  A106144 A106145 A106146 * A106148 A106149 A106150

KEYWORD

nonn,easy

AUTHOR

Roger L. Bagula, May 07 2005

EXTENSIONS

Edited and new name from Joerg Arndt, Jun 25 2022

STATUS

approved

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Last modified October 6 21:32 EDT 2022. Contains 357270 sequences. (Running on oeis4.)