The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A265660 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A265660

Number of nX2 arrays containing 2 copies of 0..n-1 with no element plus any horizontal or vertical neighbor equal to n-1.
(history; published version)

#5 by N. J. A. Sloane at Fri Aug 12 07:04:20 EDT 2016

NAME

Number of nX2 arrays of permutations of containing 2 copies of 0..n-1 with no element plus any horizontal or vertical neighbor equal to n-1.

Discussion

Fri Aug 12

07:04

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

#4 by R. H. Hardin at Sat Dec 12 11:04:58 EST 2015

STATUS

editing

approved

#3 by R. H. Hardin at Sat Dec 12 11:04:55 EST 2015

NAME

allocated for R. H. Hardin

Number of nX2 arrays of permutations of 2 copies of 0..n-1 with no element plus any horizontal or vertical neighbor equal to n-1.

DATA

0, 0, 0, 112, 4912, 265440, 31924032, 3170361984, 597787563264, 97379218955520, 26489701471180800, 6432079809975552000

OFFSET

1,4

COMMENTS

Column 2 of A265663.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A265663.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Dec 12 2015

STATUS

approved

editing

#2 by R. H. Hardin at Sat Dec 12 11:03:36 EST 2015

KEYWORD

allocating

allocated

#1 by R. H. Hardin at Sat Dec 12 11:03:36 EST 2015

NAME

allocated for R. H. Hardin

KEYWORD

allocating

STATUS

approved