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A060140 Ordered set S defined by these rules: 0 and 1 are in S and if x is a nonzero number in S, then 3x and 9x+1 are in S. +0
1
0, 1, 3, 9, 10, 27, 28, 30, 81, 82, 84, 90, 91, 243, 244, 246, 252, 253, 270, 271, 273, 729, 730, 732, 738, 739, 756, 757, 759, 810, 811, 813, 819, 820, 2187, 2188, 2190, 2196, 2197, 2214, 2215, 2217, 2268, 2269, 2271, 2277, 2278, 2430, 2431, 2433, 2439 (list; graph; listen)
OFFSET

0,3

COMMENT

The numbers of the form 9x+1 occupy the same positions in S that 1 occupies in the infinite Fibonacci word (A003849).

REFERENCES

Preprint available from Clark Kimberling

CROSSREFS

Sequence in context: A092169 A093108 A077560 this_sequence A025616 A136852 A031115

Adjacent sequences: A060137 A060138 A060139 this_sequence A060141 A060142 A060143

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu), Mar 05 2001

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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