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A234544 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant stress 1X1 tilings) 1
1212, 6896, 39188, 222988, 1269812, 7237508, 41285540, 235717236, 1346930052, 7703391252, 44093945060, 252614282612, 1448426221700, 8312186475348, 47741148641380, 274441042958900, 1578929657150788, 9091864955315348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A234549

LINKS

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

FORMULA

Empirical: a(n) = 17*a(n-1) -30*a(n-2) -944*a(n-3) +5146*a(n-4) +8720*a(n-5) -112704*a(n-6) +148224*a(n-7) +392632*a(n-8) -632528*a(n-9) -548544*a(n-10) +867968*a(n-11) +341120*a(n-12) -478976*a(n-13) -76800*a(n-14) +92160*a(n-15)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A047627 A252213 A258727 * A047626 A204339 A204332

Adjacent sequences:  A234541 A234542 A234543 * A234545 A234546 A234547

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 28 2013

STATUS

approved

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Last modified October 21 11:09 EDT 2021. Contains 348150 sequences. (Running on oeis4.)