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A235316 Number of (n+1)X(5+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant stress 1X1 tilings) 1
11776, 22568, 40144, 89600, 184144, 459536, 1062832, 2873552, 7275856, 20859728, 56503984, 169327760, 482451664, 1496230736, 4431395632, 14119144592, 43104667216, 140303136848, 438787720624, 1452514539920, 4631009477584 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A235319

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..176

FORMULA

Empirical: a(n) = 4*a(n-1) +47*a(n-2) -200*a(n-3) -901*a(n-4) +4204*a(n-5) +8957*a(n-6) -48440*a(n-7) -47194*a(n-8) +334096*a(n-9) +101948*a(n-10) -1410080*a(n-11) +170136*a(n-12) +3549696*a(n-13) -1446912*a(n-14) -4861440*a(n-15) +2954880*a(n-16) +2764800*a(n-17) -2073600*a(n-18)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A250680 A045307 A229411 * A336658 A321158 A046192

Adjacent sequences:  A235313 A235314 A235315 * A235317 A235318 A235319

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified December 1 12:50 EST 2020. Contains 338833 sequences. (Running on oeis4.)