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A235079 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant stress tilted 1X1 tilings) 0
38, 198, 830, 3558, 13446, 53590, 196302, 763814, 2809478, 10902494, 40824462, 159294206, 608274054, 2390311294, 9275377822 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A235087

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=5

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

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

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

..3..1..3..1..4..2....3..2..4..1..3..2....1..3..2..3..1..2....3..2..3..1..3..1

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

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

CROSSREFS

Sequence in context: A137022 A160064 A297541 * A005910 A281769 A191698

Adjacent sequences:  A235076 A235077 A235078 * A235080 A235081 A235082

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 03 2014

STATUS

approved

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Last modified September 18 20:10 EDT 2021. Contains 347534 sequences. (Running on oeis4.)