OFFSET
1,2
COMMENTS
REFERENCES
V. F. Sirvent, Semigroups and the self-similar structure of the flipped tribonacci substitution, Applied Math. Letters, 12 (1999), 25-29.
EXAMPLE
a(1): 1,
a(2): 12,
a(3): 1231,
a(4): 1231112,
a(5): 1231112121231,
a(6): 123111212123112311231112,
a(7): 12311121212311231123111212311121231112121231,
equals a(6).a(4).a(5), look:
a(6):123111212123112311231112,
a(4): 1231112,
a(5): 1231112121231,
a(8): 123111212123112311231112123111212311121212311231112121231123111212123112311231112
equals a(7).a(5).a(6), look:
a(7): 12311121212311231123111212311121231112121231,
a(5): 1231112121231,
a(6): 123111212123112311231112,
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 21 2018
STATUS
approved