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A233991 Number of (n+1)X(2+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
774, 3040, 11622, 51026, 218602, 1058618, 4923910, 25667010, 126489782, 690800294, 3533497602, 19797058950, 103613461346, 587718236894, 3119919914130, 17784977065082, 95276354415258, 543743313418490 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233997

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A033919 A055521 A255156 * A250087 A252673 A077077

Adjacent sequences:  A233988 A233989 A233990 * A233992 A233993 A233994

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified February 18 21:20 EST 2020. Contains 332028 sequences. (Running on oeis4.)