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A233996 Number of (n+1)X(7+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18 0
1995424, 4923910, 11510748, 39038268, 117312896, 533896296, 1997753492, 12585162304, 57382924232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A233997

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=1

..0..6..0..6..0..0..1..0....0..3..6..1..5..6..5..5....0..3..6..2..0..0..5..5

..3..3..3..3..3..5..4..5....3..6..1..4..0..5..0..2....3..6..1..5..5..3..0..6

CROSSREFS

Sequence in context: A254482 A219434 A172791 * A081398 A022226 A032754

Adjacent sequences:  A233993 A233994 A233995 * A233997 A233998 A233999

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified February 28 01:30 EST 2020. Contains 332319 sequences. (Running on oeis4.)