The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A220797 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A220797

Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 4Xn array
(history; published version)

#3 by R. H. Hardin at Fri Dec 21 06:19:13 EST 2012

STATUS

editing

approved

#2 by R. H. Hardin at Fri Dec 21 06:19:09 EST 2012

NAME

allocated for R. H. Hardin

Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 4Xn array

DATA

1, 94, 1224, 32507, 602536, 10731537, 183846017

OFFSET

1,2

COMMENTS

Row 4 of A220794

EXAMPLE

Some solutions for n=3

..0..1..0....0..1..0....1..1..1....1..0..1....0..1..0....0..0..0....0..0..0

..1..1..0....0..0..1....0..0..0....0..0..1....0..1..0....1..0..0....0..0..1

..0..0..0....0..1..0....0..1..0....0..0..0....0..0..0....1..0..1....1..1..0

..0..0..0....0..1..0....0..1..0....0..0..1....0..0..0....1..0..0....0..0..0

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin Dec 21 2012

STATUS

approved

editing

#1 by R. H. Hardin at Fri Dec 21 06:14:15 EST 2012

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved