The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A196975 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A196975

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

#6 by Charles R Greathouse IV at Fri Dec 18 18:17:48 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 3,2,1,0,4 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 12:36:27 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Oct 08 2011

Discussion

Sat Mar 31

12:36

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

#4 by Ron Hardin at Sat Oct 08 09:34:50 EDT 2011

STATUS

editing

approved

#3 by Ron Hardin at Sat Oct 08 09:34:46 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 3,2,1,0,4 for Ron Hardinx=0,1,2,3,4

DATA

1, 5, 65, 2425, 272332, 91153533, 90401915964, 266535433627635, 2320436756494474533

OFFSET

1,2

COMMENTS

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

Diagonal of A196982

EXAMPLE

Some solutions for n=4

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

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

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

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Oct 08 2011

STATUS

approved

editing

#2 by Ron Hardin at Sat Oct 08 09:33:42 EDT 2011

KEYWORD

allocating

allocated

#1 by Ron Hardin at Sat Oct 08 09:33:42 EDT 2011

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved