The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A196740 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A196740

Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,1,0,4 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 2,3,1,0,4 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 06 2011

Discussion

Sat Mar 31

12:36

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

#4 by Ron Hardin at Thu Oct 06 05:33:43 EDT 2011

STATUS

editing

approved

#3 by Ron Hardin at Thu Oct 06 05:33:38 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 2,3,1,0,4 for Ron Hardinx=0,1,2,3,4

DATA

1, 1, 20, 401, 35202, 7942712, 5423213789, 10714890351493, 61977591097741664, 1045534716234234877628, 51543884247862488090471612

OFFSET

1,3

COMMENTS

Every 0 is next to 0 2's, every 1 is next to 1 3'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 A196746

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..0..0..0....0..3..0..0....0..0..0..0....0..3..0..0

..0..0..0..0....0..0..0..3....0..0..0..0....3..0..0..3....0..0..0..0

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

..0..0..3..0....0..0..0..0....0..3..0..0....0..3..0..0....0..0..3..0

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Oct 06 2011

STATUS

approved

editing

#2 by Ron Hardin at Thu Oct 06 05:32:05 EDT 2011

KEYWORD

allocating

allocated

#1 by Ron Hardin at Thu Oct 06 05:32:05 EDT 2011

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved