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A120873
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Fractal sequence of the Wythoff difference array (A080164).
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0
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1, 1, 2, 3, 1, 4, 2, 5, 6, 3, 7, 8, 1, 9, 4, 10, 11, 2, 12, 5, 13, 14, 6, 15, 16, 3, 17, 7, 18, 19, 8, 20, 21, 1, 22, 9, 23, 24, 4, 25, 10, 26, 27, 11, 28, 29, 2, 30, 12, 31, 32, 5, 33, 13, 34, 35, 14, 36, 37, 6, 38, 15, 39, 40, 16, 41, 42, 3, 43, 17, 44, 45, 7, 46, 18, 47, 48, 19, 49
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listen;
history;
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OFFSET
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1,3
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COMMENTS
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A fractal sequence f contains itself as a proper subsequence; e.g., if you delete the first occurrence of each positive integer, the remaining sequence is f; thus f properly contains itself infinitely many times.
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REFERENCES
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Clark Kimberling, The Wythoff difference array, in Applications of Fibonacci Numbers, vol.10, Proceedings of the Eleventh International Conference on Fibonacci Numbers and Their Applications, William Webb, editor, Congressus Numerantium, Winnipeg, Manitoba 194 (2009) 153-158.
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LINKS
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Table of n, a(n) for n=1..79.
N. J. A. Sloane, Classic Sequences.
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EXAMPLE
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The fractal sequence f(n) of a dispersion D={d(g,h,)} is defined as follows.
For each positive integer n there is a unique (g,h) such that n=d(g,h) and
f(n)=g.
So f(7)=2 because the row of the WDA in which 7 occurs is row 2.
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CROSSREFS
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Cf. A080164.
Sequence in context: A023131 A026276 A152201 * A125161 A125933 A011857
Adjacent sequences: A120870 A120871 A120872 * A120874 A120875 A120876
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling, Jul 10 2006
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STATUS
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approved
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