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 A135481 a(n) = 2^A007814(n+1) - 1. 6
 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 15, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 31, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 15, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 63, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 15, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 31, 0, 1, 0, 3, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Antti Karttunen, Table of n, a(n) for n = 0..16384 FORMULA a(n) = A006519(n+1) - 1. - R. J. Mathar, Feb 10 2016 MAPLE GS(1, 6, 200); # see A135416 MATHEMATICA Table[BitAnd[i, BitNot[i+1]], {i, 0, 200}] (* Peter Luschny, Jun 01 2011 *) PROG (PARI) a(n) = 2^valuation(n+1, 2)-1; \\ Michel Marcus, Nov 19 2017 CROSSREFS Cf. A006519, A007814, A135416, A140670. This is Guy Steele's sequence GS(1, 6) (see A135416). Sequence in context: A238341 A242451 A262964 * A180049 A244454 A238123 Adjacent sequences:  A135478 A135479 A135480 * A135482 A135483 A135484 KEYWORD nonn AUTHOR N. J. A. Sloane, based on a message from Guy Steele and Don Knuth, Mar 01 2008 EXTENSIONS a(0) = 0 prepended by Andrey Zabolotskiy, Oct 08 2019, based on Lothar Esser's contribution STATUS approved

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Last modified May 25 17:53 EDT 2020. Contains 334595 sequences. (Running on oeis4.)