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A235180 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 5, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
212, 560, 1400, 3796, 9780, 27080, 71244, 200164, 535384, 1520236, 4122676, 11802552, 32387932, 93334500, 258770168, 749813004, 2097549460, 6106147288, 17214643468, 50312715684, 142794762392, 418766264044, 1195325876852 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235186

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +29*a(n-2) -88*a(n-3) -327*a(n-4) +1003*a(n-5) +1816*a(n-6) -5577*a(n-7) -5295*a(n-8) +15566*a(n-9) +8705*a(n-10) -20575*a(n-11) -9813*a(n-12) +12552*a(n-13) +5962*a(n-14) -3436*a(n-15) -1676*a(n-16) +336*a(n-17) +168*a(n-18)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A078211 A158794 A204364 * A114880 A348831 A200433

Adjacent sequences:  A235177 A235178 A235179 * A235181 A235182 A235183

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2014

STATUS

approved

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Last modified January 17 15:20 EST 2022. Contains 350402 sequences. (Running on oeis4.)