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A235243 Number of (n+1)X(3+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
3746, 10866, 31858, 108374, 359962, 1305758, 4596034, 17276982, 63001946, 243085134, 909934434, 3586769950, 13711602746, 55035076230, 214054835346, 872409743726, 3441514152170, 14207234974590, 56691746507634 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A235248

LINKS

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

R. H. Hardin, Empirical recurrence of order 61

FORMULA

Empirical recurrence of order 61 (see link above)

EXAMPLE

Some solutions for n=4

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

..7..2..7..2....6..2..3..0....5..1..4..1....3..5..2..4....7..2..7..2

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

..7..2..7..2....6..2..3..0....6..2..5..2....2..4..1..3....5..0..5..0

..2..3..2..3....3..5..0..3....1..3..0..3....7..3..6..2....2..3..2..3

CROSSREFS

Sequence in context: A166262 A340403 A235977 * A180974 A285158 A238031

Adjacent sequences:  A235240 A235241 A235242 * A235244 A235245 A235246

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified October 27 07:47 EDT 2021. Contains 348272 sequences. (Running on oeis4.)