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A234893 Number of (n+1)X(3+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
3456, 20404, 113288, 743436, 4634504, 32110856, 208211944, 1482491852, 9763925800, 70741188392, 469704123072, 3449044260864, 23022329803976, 170950844777056, 1145540286614792, 8587053971274908, 57714312161683112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A234898

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A210626 A278270 A179705 * A251485 A082242 A321866

Adjacent sequences:  A234890 A234891 A234892 * A234894 A234895 A234896

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

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Last modified April 20 22:22 EDT 2019. Contains 322310 sequences. (Running on oeis4.)