The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A227359 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A227359

Natural numbers that are not of the form (k +- sum of binary digits of k) for any k.
(history; published version)

#28 by Michael De Vlieger at Sun Oct 02 10:33:13 EDT 2022

STATUS

reviewed

approved

#27 by Joerg Arndt at Sun Oct 02 02:27:25 EDT 2022

STATUS

proposed

reviewed

#26 by Amiram Eldar at Sun Oct 02 02:24:27 EDT 2022

STATUS

editing

proposed

#25 by Amiram Eldar at Sun Oct 02 02:13:36 EDT 2022

COMMENTS

The numbers of terms not exceeding 10^k, for k = 1, 2, ..., are 1, 9, 127, 1362, 12921, 128429, 1261747, 12554142, 125697648, 1257065977, ... . Conjecture: this This sequence has an asymptotic density (1/2) * A242403 = 0.126330... . - Amiram Eldar, Oct 02 2022

#24 by Amiram Eldar at Sun Oct 02 02:12:53 EDT 2022

NAME

Natural numbers n that are not of the form (k +- sum of binary digits of k) for any k.

#23 by Amiram Eldar at Sun Oct 02 02:12:34 EDT 2022

COMMENTS

The numbers of terms not exceeding 10^k, for k = 1, 2, ..., are 1, 9, 127, 1362, 12921, 128429, 1261747, 12554142, 125697648, 1257065977, ... . Conjecture: this sequence has an asymptotic density (1/2) * A242403 = 0.126330... . - Amiram Eldar, Oct 02 2022

LINKS

Andres M. Torres, <a href="https://www.dropbox.com/s/brpxv3tesn25hjs/Sequence%20A227359.zip">Zip file containing Blitz3D code</a>.

CROSSREFS

Cf. A055938, A010061, A010062, A242403.

STATUS

approved

editing

#22 by Jon E. Schoenfield at Sat Mar 28 17:25:01 EDT 2015

STATUS

editing

approved

#21 by Jon E. Schoenfield at Sat Mar 28 17:24:59 EDT 2015

NAME

Natural numbers n, which that are not of the form (k +- sum of binary digits of k) for any k.

STATUS

approved

editing

#20 by N. J. A. Sloane at Wed Feb 04 23:25:43 EST 2015

STATUS

proposed

approved

#19 by Jon E. Schoenfield at Wed Feb 04 19:36:02 EST 2015

STATUS

editing

proposed