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A280910 Characteristic sequence of A277238. 1
0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..65537

Index entries for sequences related to binary expansion of n

Index entries for characteristic functions

PROG

(PARI) A280910(n) = if(n<=1, n, my(b = binary(n)); if ((#b % 2) && (b[#b\2+1] == 0), return (0)); vecmin(vector(#b\2, k, bitxor(b[k], b[#b-k+1]))) == 1); \\ Antti Karttunen, Dec 23 2018, after isok function given in A277238 by Michel Marcus, Oct 07 2016

CROSSREFS

Cf. A277238.

Sequence in context: A316341 A284901 A071981 * A305816 A241979 A200244

Adjacent sequences:  A280907 A280908 A280909 * A280911 A280912 A280913

KEYWORD

nonn

AUTHOR

Taylor J. Smith, Jan 10 2017

EXTENSIONS

Term a(0) = 0 prepended and more terms added by Antti Karttunen, Dec 23 2018

STATUS

approved

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Last modified December 15 22:02 EST 2019. Contains 330012 sequences. (Running on oeis4.)