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A164859
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a(1)=1. a(n) = the smallest positive integer that, when written in binary, contains both binary a(n-1) and binary n as (possibly overlapping) substrings.
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1, 2, 6, 12, 44, 44, 236, 472, 2520, 10712, 10712, 10712, 10712, 10712, 125400, 250800, 2347952, 19125168, 19125168, 19125168, 354669488, 354669488, 6260249520, 6260249520, 109339464624, 109339464624, 109339464624
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| a(6) = 44, which is 101100 in binary. a(7) therefore contains both 101100 and the binary representation of 7, which is 111, as substrings when a(7) is written in binary. So a(7) = 236, which is 11101100 in binary. (Both substrings share a single digit of 1.)
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CROSSREFS
| Cf. A056744.
Sequence in context: A127724 A178008 A056744 * A180070 A177834 A169858
Adjacent sequences: A164856 A164857 A164858 * A164860 A164861 A164862
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KEYWORD
| base,nonn
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AUTHOR
| Leroy Quet, Aug 28 2009
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Mar 14 2010
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