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A221168 The infinite generalized Fibonacci word p^[4]. 5
0, 1, 0, 1, 0, 3, 0, 3, 0, 3, 2, 3, 2, 3, 0, 3, 0, 3, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, 0, 3, 0, 3, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 2, 1, 0, 1, 0, 1, 0, 3, 0, 3, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, 0, 3, 0, 3, 0, 3, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
LINKS
José L. Ramírez, Gustavo N. Rubiano, and Rodrigo de Castro, A Generalization of the Fibonacci Word Fractal and the Fibonacci Snowflake, arXiv preprint arXiv:1212.1368 [cs.DM], 2012-2014.
MAPLE
# fmorph, sigma1f and sigma01f are defined in A221166.
A221168 := proc(n)
sigma01f(n, 4) ;
end proc: # R. J. Mathar, Jul 09 2013
MATHEMATICA
fibi[n_, i_] := fibi[n, i] = Which[n == 0, {0}, n == 1, Append[Table[0, {j, 1, i - 1}], 1], True, Join[fibi[n - 1, i], fibi[n - 2, i]]];
fibonni[n_, i_] := fibonni[n, i] = Module[{fn, Fn}, For[fn = 0, True, fn++, Fn = fibi[fn, i]; If[Length[Fn] >= n + 1 && Length[Fn] > i + 3, Return[Fn[[n + 1]]]]]];
fmorph[n_, i_] := If[fibonni[n, i] == 0, 2, 0];
sigma1f[n_, i_] := If[n == 0, 1, 1 + Mod[Sum[fmorph[j, i], {j, 0, n - 1}], 4]];
sigma01f[n_, i_] := If[n == 0, 0, Mod[Sum[sigma1f[j, i], {j, 0, n - 1}], 4]]; a[n_] := sigma01f[n, 4]; Table[a[n], {n, 0, 100}] (* Jean-François Alcover, Nov 30 2017, after R. J. Mathar *)
CROSSREFS
Sequence in context: A221170 A307199 A141030 * A194084 A262281 A297871
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 04 2013
STATUS
approved

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Last modified May 21 11:30 EDT 2024. Contains 372736 sequences. (Running on oeis4.)