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Revision History for A067958 (Bold, blue-underlined text is an addition; faded, red-underlined text is a deletion.)

Showing entries 1-10 | older changes
Number of binary arrangements without adjacent 1's on n X n torus connected e-w ne-sw n-s nw-se.
(history; published version)
#25 by Michael De Vlieger at Sun Sep 17 21:36:06 EDT 2023
STATUS

proposed

approved

#24 by Jon E. Schoenfield at Sun Sep 17 21:16:20 EDT 2023
STATUS

editing

proposed

#23 by Jon E. Schoenfield at Sun Sep 17 21:16:17 EDT 2023
COMMENTS

For n > 1 is , a(n) is also the number of ways to populate an n X n toroidal chessboard with non-attacking kings (including the case of zero kings). - Vaclav Kotesovec, Oct 10 2011

EXAMPLE

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STATUS

approved

editing

#22 by Vaclav Kotesovec at Sat May 15 02:21:18 EDT 2021
STATUS

editing

approved

#21 by Vaclav Kotesovec at Sat May 15 02:11:50 EDT 2021
DATA

1, 5, 10, 133, 1411, 42938, 1796859, 157763829, 22909432780, 6291183426165, 3032485231813445, 2674030233698391466, 4216437656471537450175, 12038380931111061789962901, 61810608197507432888286102310, 572863067272579464080483552434421

EXTENSIONS

a(15)-a(16) from Vaclav Kotesovec, May 15 2021

STATUS

approved

editing

#20 by Vaclav Kotesovec at Tue Aug 30 06:39:22 EDT 2016
STATUS

editing

approved

#19 by Vaclav Kotesovec at Tue Aug 30 06:39:18 EDT 2016
CROSSREFS

Cf. A212269.

STATUS

approved

editing

#18 by Vaclav Kotesovec at Mon Aug 22 08:16:11 EDT 2016
STATUS

editing

approved

#17 by Vaclav Kotesovec at Mon Aug 22 08:16:06 EDT 2016
KEYWORD

nonn,changed,hard

STATUS

approved

editing

#16 by Vaclav Kotesovec at Mon Aug 22 08:12:13 EDT 2016
STATUS

editing

approved