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 A106437 Fixed point of the morphism 1->4, 2->1222, 3->2, 4->3444, applied 4*k times to 4. 0
 4, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 1, 2, 2, 2, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 2, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 4, 4, 1, 2, 2, 2, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA 1->{4}, 2->{1, 2, 2, 2}, 3->{2}, 4->{3, 4, 4, 4}. MATHEMATICA s[1] = {4}; s[2] = {1, 2, 2, 2}; s[3] = {2}; s[4] = {3, 4, 4, 4}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]] aa = p[5] CROSSREFS Cf. A001906, A006190. Sequence in context: A112621 A081448 A322906 * A054713 A213884 A117021 Adjacent sequences:  A106434 A106435 A106436 * A106438 A106439 A106440 KEYWORD nonn,easy,less AUTHOR Roger L. Bagula, May 29 2005 EXTENSIONS New name from Joerg Arndt, Nov 07 2016 STATUS approved

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Last modified February 19 08:57 EST 2019. Contains 320309 sequences. (Running on oeis4.)