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Search: id:A033046
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| A033046 |
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Numbers whose set of base 9 digits is {0,1}. |
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+0
6
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| 0, 1, 9, 10, 81, 82, 90, 91, 729, 730, 738, 739, 810, 811, 819, 820, 6561, 6562, 6570, 6571, 6642, 6643, 6651, 6652, 7290, 7291, 7299, 7300, 7371, 7372, 7380, 7381, 59049, 59050, 59058, 59059, 59130, 59131, 59139, 59140, 59778, 59779, 59787
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Sums of distinct powers of 9.
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..1023
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FORMULA
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a(n)=Sum{d(i)*9^i: i=0, 1, ..., m}, where Sum{d(i)*2^i: i=0, 1, ..., m} is the base 2 representation of n.
a(n) = A097255(n)/8.
a(2n) = 9*a(n), a(2n+1) = a(2n)+1.
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CROSSREFS
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Cf. A000695, A005836, A033043-A033052.
Row 9 of array A104257.
Sequence in context: A135332 A098325 A101242 this_sequence A025635 A116555 A038300
Adjacent sequences: A033043 A033044 A033045 this_sequence A033047 A033048 A033049
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KEYWORD
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nonn,base
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 3 2004
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