The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A207007

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A207007

Number of n X n 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column
(history; published version)

#6 by Charles R Greathouse IV at Fri Dec 18 18:18:00 EST 2015

NAME

Number of nXn n X n 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column

Discussion

Fri Dec 18

18:18

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

#5 by Russ Cox at Sat Mar 31 12:37:14 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Feb 14 2012

Discussion

Sat Mar 31

12:37

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

#4 by Ron Hardin at Tue Feb 14 11:10:39 EST 2012

STATUS

editing

approved

#3 by Ron Hardin at Tue Feb 14 11:10:35 EST 2012

NAME

allocated for Ron HardinNumber of nXn 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column

DATA

3, 81, 7891, 5174065, 18649387825, 381916401448593, 44164224032234465777

OFFSET

1,1

COMMENTS

Diagonal of A207015

EXAMPLE

Some solutions for n=4

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

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

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

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 14 2012

STATUS

approved

editing

#2 by Ron Hardin at Tue Feb 14 11:09:34 EST 2012

KEYWORD

allocating

allocated

#1 by Ron Hardin at Tue Feb 14 11:09:34 EST 2012

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved