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A234677 Number of (n+1)X(4+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant stress 1X1 tilings) 1
4568, 9108, 17312, 41832, 93680, 254784, 639440, 1878960, 5098448, 15829008, 45291152, 146459472, 434549840, 1448936784, 4409332880, 15047298000, 46627861328, 161947291728, 508508258192, 1789849512912, 5675323653200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A234681

LINKS

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

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=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A020436 A104947 A030471 * A252063 A068756 A252099

Adjacent sequences:  A234674 A234675 A234676 * A234678 A234679 A234680

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

STATUS

approved

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Last modified September 24 12:20 EDT 2020. Contains 337318 sequences. (Running on oeis4.)