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A235192 Number of (n+1)X(2+1) 0..6 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
512, 1544, 4724, 15604, 51144, 176104, 597712, 2109748, 7324940, 26321996, 92931536, 338626216, 1211027400, 4461593140, 16115753860, 59891994316, 218009580968, 815799341144, 2987272973648, 11239524639028, 41346560068716 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235198

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +52*a(n-2) -367*a(n-3) -995*a(n-4) +9350*a(n-5) +7034*a(n-6) -128869*a(n-7) +26637*a(n-8) +1045428*a(n-9) -801048*a(n-10) -5098437*a(n-11) +5754163*a(n-12) +14714982*a(n-13) -20381230*a(n-14) -23985995*a(n-15) +38063780*a(n-16) +20215810*a(n-17) -35199080*a(n-18) -8246780*a(n-19) +13170048*a(n-20) +2801112*a(n-21) -1572480*a(n-22) -393120*a(n-23)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A258726 A220583 A195092 * A203451 A251192 A251187

Adjacent sequences:  A235189 A235190 A235191 * A235193 A235194 A235195

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2014

STATUS

approved

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Last modified September 18 14:45 EDT 2020. Contains 337169 sequences. (Running on oeis4.)