The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A247647 Binary numbers that begin and end with 1 and do not contain two adjacent zeros. 6
 1, 11, 101, 111, 1011, 1101, 1111, 10101, 10111, 11011, 11101, 11111, 101011, 101101, 101111, 110101, 110111, 111011, 111101, 111111, 1010101, 1010111, 1011011, 1011101, 1011111, 1101011, 1101101, 1101111, 1110101, 1110111, 1111011, 1111101, 1111111, 10101011, 10101101, 10101111, 10110101, 10110111, 10111011, 10111101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = A007088(A247648(n)). LINKS Chai Wah Wu, Table of n, a(n) for n = 1..1000 PROG (Python) A247647_list = [int(bin(n)[2:]) for n in range(1, 10**5) if n % 2 and not '00' in bin(n)] # Chai Wah Wu, Sep 25 2014 (Haskell) a247647 = a007088 . a247648  -- Reinhard Zumkeller, Sep 25 2014 CROSSREFS See A247648 for the decimal equivalents. Cf. A007088, A247649, A253085. Sequence in context: A264406 A057148 A076289 * A240602 A117697 A305395 Adjacent sequences:  A247644 A247645 A247646 * A247648 A247649 A247650 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Sep 25 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 20 06:51 EDT 2020. Contains 337264 sequences. (Running on oeis4.)