The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A001951 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A001951

A Beatty sequence: a(n) = floor(n*sqrt(2)).
(history; published version)

#162 by N. J. A. Sloane at Wed Oct 02 14:35:24 EDT 2024

STATUS

proposed

approved

#161 by Felix Huber at Fri Sep 20 10:10:50 EDT 2024

STATUS

editing

proposed

#160 by Felix Huber at Fri Sep 20 10:03:48 EDT 2024

COMMENTS

a(n) is also the number of distinct straight cylinders with integer radius and height having the same surface as a sphere with radius n. - Felix Huber, Sep 20 2024

STATUS

approved

editing

#159 by Michael De Vlieger at Wed Feb 14 17:27:29 EST 2024

STATUS

reviewed

approved

#158 by Michel Marcus at Wed Feb 14 17:26:27 EST 2024

STATUS

proposed

reviewed

#157 by Michael De Vlieger at Wed Feb 14 17:09:24 EST 2024

STATUS

editing

proposed

#156 by Michael De Vlieger at Wed Feb 14 17:09:22 EST 2024

LINKS

Luke Schaeffer, Jeffrey Shallit, and Stefan Zorcic, <a href="https://arxiv.org/abs/2402.08331">Beatty Sequences for a Quadratic Irrational: Decidability and Applications</a>, arXiv:2402.08331 [math.NT], 2024. See pp. 17-18.

STATUS

approved

editing

#155 by N. J. A. Sloane at Sat Aug 05 21:20:47 EDT 2023

STATUS

proposed

approved

#154 by Jon E. Schoenfield at Sat Aug 05 16:50:56 EDT 2023

STATUS

editing

proposed

#153 by Jon E. Schoenfield at Sat Aug 05 16:50:51 EDT 2023

COMMENTS

The elements terms of this sequence generate the multiplicative group of positive rational numbers (observation by Stephen M. Gagola, Jr.; see References). - Allen Stenger, Aug 05 2023

STATUS

proposed

editing