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A233990 Number of (n+1)X(1+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 1
164, 774, 3496, 17156, 81200, 409848, 1995424, 10261264, 50945472, 264997984, 1333409408, 6980548160, 35444523776, 186152208256, 951061641728, 5001337944320, 25661802421248, 134974683653632, 694675975022592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233997

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A240248 A105653 A233997 * A223455 A251197 A038670

Adjacent sequences:  A233987 A233988 A233989 * A233991 A233992 A233993

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified February 21 02:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)