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A233976 Number of (n+1)X(3+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 13 1
7920, 59440, 455832, 4097024, 37974312, 389559628, 4063204904, 45100814568, 501030842392, 5792456074928, 66350084305560, 782242974657312, 9089302555320488, 108144697929807660, 1264930350635066256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A233980

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A155178 A031922 A121236 * A001228 A036325 A031587

Adjacent sequences:  A233973 A233974 A233975 * A233977 A233978 A233979

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified January 18 14:07 EST 2021. Contains 340254 sequences. (Running on oeis4.)