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 A105313 Tetrahedron digraph 4-symbol substitution : characteristic polynomial: x^4-6*x^2-8*x-3. 0
 1, 1, 4, 3, 2, 1, 4, 3, 2, 4, 3, 2, 3, 2, 1, 4, 2, 1, 4, 3, 1, 1, 4, 3, 2, 4, 3, 2, 3, 2, 1, 4, 2, 1, 4, 3, 1, 4, 3, 2, 3, 2, 1, 4, 2, 1, 4, 3, 1, 3, 2, 1, 4, 2, 1, 4, 3, 1, 4, 2, 1, 4, 3, 1, 4, 3, 2, 3, 2, 1, 4, 3, 1, 4, 3, 2, 3, 2, 1, 4, 2, 1, 4, 3, 2, 1, 4, 3, 2, 4, 3, 2, 3, 2, 1, 4, 2, 1, 4, 3, 1, 4, 3, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA 1->{2, 3, 4}, 2->{1, 3, 4}, 3->{1, 2, 4}, 4->{1, 2, 3} MATHEMATICA s[1] = {4, 3, 2}; s[2] = {4, 3, 1}; s[3] = {4, 2, 1}; s[4] = {3, 2, 1}; t[a_] := Join[a, Flatten[s /@ a]]; p[0] = {1}; p[1] = t[{1}]; p[n_] := t[p[n - 1]] aa = Flatten[Table[p[n], {n, 0, 4}]] CROSSREFS Sequence in context: A093580 A196535 A106655 * A085064 A030587 A194764 Adjacent sequences:  A105310 A105311 A105312 * A105314 A105315 A105316 KEYWORD nonn AUTHOR Roger L. Bagula, Apr 25 2005 STATUS approved

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Last modified January 19 20:48 EST 2022. Contains 350466 sequences. (Running on oeis4.)