The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A221307 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A221307

Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two
(history; published version)

#3 by R. H. Hardin at Wed Jan 09 16:37:22 EST 2013

STATUS

editing

approved

#2 by R. H. Hardin at Wed Jan 09 16:37:19 EST 2013

NAME

allocated for R. H. Hardin

Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two

DATA

0, 90, 0, 38146, 0, 19642342, 0, 9842336697, 0, 4907450696408, 0, 2441328266555768, 0, 1213489893520857350, 0, 602992641919618581949, 0, 299597420150822374508346, 0, 148848899893861061853934856, 0

OFFSET

1,2

COMMENTS

Column 5 of A221308

EXAMPLE

Some solutions for n=4

..0..0..0..2..2....0..2..0..0..0....0..0..2..0..0....2..2..0..2..0

..2..2..0..0..0....0..2..0..2..0....2..2..2..2..0....0..0..0..2..2

..0..0..2..2..0....2..2..2..2..0....0..0..0..2..2....0..0..0..0..2

..2..2..2..2..0....0..2..0..2..2....0..2..2..0..2....2..2..2..2..0

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin Jan 09 2013

STATUS

approved

editing

#1 by R. H. Hardin at Wed Jan 09 16:34:10 EST 2013

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved