The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A266316

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

Number of n X 2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west or north neighbor modulo n and the upper left element equal to 0.
(history; published version)

#9 by Michael De Vlieger at Mon Apr 15 17:55:59 EDT 2024

STATUS

reviewed

approved

#8 by Michel Marcus at Mon Apr 15 17:21:23 EDT 2024

STATUS

proposed

reviewed

#7 by Stefano Spezia at Mon Apr 15 15:57:46 EDT 2024

STATUS

editing

proposed

#6 by Stefano Spezia at Mon Apr 15 15:47:35 EDT 2024

NAME

Number of nX2 n X 2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west or north neighbor modulo n and the upper left element equal to 0.

EXAMPLE

Some solutions for n=4:

KEYWORD

nonn,more

STATUS

approved

editing

#5 by N. J. A. Sloane at Fri Aug 12 07:04:21 EDT 2016

NAME

Number of nX2 arrays of permutations of containing 2 copies of 0..n-1 with no element 1 greater than its west or north neighbor modulo n and the upper left element equal to 0.

Discussion

Fri Aug 12

07:04

OEIS Server: https://oeis.org/edit/global/2544

#4 by R. H. Hardin at Sun Dec 27 06:19:16 EST 2015

STATUS

editing

approved

#3 by R. H. Hardin at Sun Dec 27 06:19:00 EST 2015

NAME

allocated for R. H. Hardin

Number of nX2 arrays of permutations of 2 copies of 0..n-1 with no element 1 greater than its west or north neighbor modulo n and the upper left element equal to 0.

DATA

1, 0, 2, 35, 1007, 54819, 4318217, 458508379, 62976460150, 10860600443527, 2297243685069637, 584799993257765106

OFFSET

1,3

COMMENTS

Column 2 of A266318.

EXAMPLE

Some solutions for n=4

..0..2....0..3....0..2....0..2....0..3....0..2....0..3....0..3....0..3....0..2

..0..2....3..2....2..1....2..1....0..3....3..1....2..1....0..2....3..1....0..2

..3..1....2..1....1..3....1..0....2..1....2..1....2..1....3..2....2..1....3..1

..3..1....1..0....0..3....3..3....2..1....0..3....0..3....1..1....2..0....1..3

CROSSREFS

Cf. A266318.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Dec 27 2015

STATUS

approved

editing

#2 by R. H. Hardin at Sun Dec 27 06:17:12 EST 2015

KEYWORD

allocating

allocated

#1 by R. H. Hardin at Sun Dec 27 06:17:12 EST 2015

NAME

allocated for R. H. Hardin

KEYWORD

allocating

STATUS

approved