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A164859 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. 0
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; text; internal format)
OFFSET
1,2
LINKS
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.)
CROSSREFS
Cf. A056744.
Sequence in context: A266005 A056744 A344184 * A332868 A261467 A180070
KEYWORD
base,nonn
AUTHOR
Leroy Quet, Aug 28 2009
EXTENSIONS
Extended by Ray Chandler, Mar 14 2010
STATUS
approved

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Last modified June 12 23:56 EDT 2024. Contains 373362 sequences. (Running on oeis4.)