The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A197882 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A197882

Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4
(history; published version)

#6 by Charles R Greathouse IV at Fri Dec 18 18:17:54 EST 2015

NAME

Number of nXn n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4

Discussion

Fri Dec 18

18:17

OEIS Server: https://oeis.org/edit/global/2478

#5 by Russ Cox at Sat Mar 31 12:36:31 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Oct 19 2011

Discussion

Sat Mar 31

12:36

OEIS Server: https://oeis.org/edit/global/875

#4 by Ron Hardin at Wed Oct 19 00:30:28 EDT 2011

STATUS

editing

approved

#3 by Ron Hardin at Wed Oct 19 00:30:25 EDT 2011

NAME

allocated Number of nXn 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,2,1,1,1 for Ron Hardinx=0,1,2,3,4

DATA

1, 4, 6, 155, 2730, 129294, 13253562, 2512321052

OFFSET

1,2

COMMENTS

Every 0 is next to 0 0's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's

Diagonal of A197889

EXAMPLE

Some solutions containing all values 0 to 4 for n=4

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

..2..1..1..3....2..1..1..3....2..1..4..1....1..4..1..2....2..1..4..1

..2..1..4..1....2..1..4..1....2..1..1..3....3..1..1..2....0..1..1..0

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Oct 19 2011

STATUS

approved

editing

#2 by Ron Hardin at Wed Oct 19 00:29:17 EDT 2011

KEYWORD

allocating

allocated

#1 by Ron Hardin at Wed Oct 19 00:29:17 EDT 2011

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved