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Search: id:A033048
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| A033048 |
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Numbers whose set of base 12 digits is {0,1}. |
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+0
4
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| 0, 1, 12, 13, 144, 145, 156, 157, 1728, 1729, 1740, 1741, 1872, 1873, 1884, 1885, 20736, 20737, 20748, 20749, 20880, 20881, 20892, 20893, 22464, 22465, 22476, 22477, 22608, 22609, 22620, 22621, 248832, 248833, 248844, 248845, 248976
(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 12.
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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)*12^i: i=0, 1, ..., m}, where Sum{d(i)*2^i: i=0, 1, ..., m} is the base 2 representation of n.
a(n) = A097258(n)/11.
a(2n) = 12*a(n), a(2n+1) = a(2n)+1.
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CROSSREFS
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Cf. A000695, A005836, A033042-A033052.
Row 11 of array A104257.
Sequence in context: A135123 A129476 A037278 this_sequence A108771 A041308 A041309
Adjacent sequences: A033045 A033046 A033047 this_sequence A033049 A033050 A033051
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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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