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A234436 Number of (n+1)X(1+1) 0..2 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant stress 1X1 tilings) 1
32, 120, 448, 1680, 6272, 23520, 87808, 329280, 1229312, 4609920, 17210368, 64538880, 240945152, 903544320, 3373232128, 12649620480, 47225249792, 177094686720, 661153497088, 2479325614080, 9256148959232, 34710558597120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A234443

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-2)

EXAMPLE

Some solutions for n=5

..0..1....1..0....0..1....2..1....0..1....1..0....0..0....1..1....0..1....2..0

..0..0....2..2....0..0....0..0....0..2....1..1....1..0....1..0....2..2....1..0

..1..2....1..2....2..1....1..2....0..1....2..1....2..2....2..2....0..1....2..2

..0..0....0..2....2..2....1..1....0..0....2..0....0..1....2..1....0..0....2..1

..0..1....0..1....2..1....2..1....0..1....1..0....1..1....2..2....2..1....0..0

..1..1....0..0....0..0....1..1....2..2....1..1....1..2....0..1....2..0....1..2

CROSSREFS

Sequence in context: A231527 A298201 A234443 * A297461 A297698 A223314

Adjacent sequences:  A234433 A234434 A234435 * A234437 A234438 A234439

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 26 2013

STATUS

approved

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Last modified April 17 11:48 EDT 2021. Contains 343064 sequences. (Running on oeis4.)