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A234820 Number of (n+1)X(5+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6 (constant stress 1X1 tilings) 1
34092, 68570, 131704, 325424, 747192, 2099300, 5474032, 16726940, 47728392, 154893260, 471526864, 1601774924, 5115035592, 18006947180, 59642099152, 215979342860, 736198441032, 2726527920620, 9510472646224, 35856810528524 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A234823

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..89

FORMULA

Empirical: a(n) = 8*a(n-1) +60*a(n-2) -620*a(n-3) -1210*a(n-4) +20740*a(n-5) +1580*a(n-6) -392180*a(n-7) +353267*a(n-8) +4606324*a(n-9) -7135240*a(n-10) -34677440*a(n-11) +72387960*a(n-12) +165390560*a(n-13) -443380480*a(n-14) -464032320*a(n-15) +1696321584*a(n-16) +566607168*a(n-17) -3948347520*a(n-18) +465384960*a(n-19) +5084985600*a(n-20) -2142028800*a(n-21) -2757888000*a(n-22) +1741824000*a(n-23)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A204669 A344666 A227699 * A182292 A206214 A227487

Adjacent sequences:  A234817 A234818 A234819 * A234821 A234822 A234823

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2013

STATUS

approved

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Last modified November 29 18:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)