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A234676 Number of (n+1)X(3+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant stress 1X1 tilings) 1
1264, 2924, 6328, 17312, 43240, 129848, 354856, 1129256, 3265864, 10806344, 32397928, 110161352, 338146120, 1172415368, 3657091816, 12860973896, 40576496584, 144194315144, 458737409128, 1642863057992, 5259197091400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A252506 A205762 A331824 * A237327 A233887 A234147

Adjacent sequences:  A234673 A234674 A234675 * A234677 A234678 A234679

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2013

STATUS

approved

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Last modified October 25 19:28 EDT 2020. Contains 338012 sequences. (Running on oeis4.)