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Search: id:A070869
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| A070869 |
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a(1) = 16; a(n+1) = sum of a(n) and (a(n) written in base 2 and reversed). |
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+0
1
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| 16, 17, 34, 51, 102, 153, 306, 459, 882, 1197, 2646, 4347, 11484, 15273, 24864, 25443, 50886, 76329, 152274, 229371, 458742, 688113, 1277910, 2162607, 6193008, 6684333, 12631680, 12729219, 25434054, 38529033, 76302162, 115562715
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 125.
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EXAMPLE
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To get a(2) note that 16 = 10000 in base 2, reversing gives 00001, or 1, and so a(2) = 16 + 1 = 17.
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MATHEMATICA
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a[1] = 16; a[n_] := Block[{b = IntegerDigits[ a[n - 1], 2]}, FromDigits[ b + Reverse[b], 2]]; Table[ a[n], {n, 1, 35}]
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CROSSREFS
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Sequence in context: A041516 A041514 A041512 this_sequence A101196 A064637 A115942
Adjacent sequences: A070866 A070867 A070868 this_sequence A070870 A070871 A070872
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KEYWORD
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nonn,easy,base
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AUTHOR
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njas, May 19 2002
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 20 2002
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