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A234561 Number of (n+1)X(5+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant stress 1X1 tilings) 1
5506, 8416, 12750, 23830, 42982, 94114, 195558, 479914, 1108726, 2964106, 7385190, 21074650, 55254742, 165527434, 448561158, 1392113914, 3852440566, 12264562666, 34393441830, 111531402970, 315410580502, 1036750071754, 2947674917958 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A234564

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +30*a(n-2) -132*a(n-3) -331*a(n-4) +1720*a(n-5) +1530*a(n-6) -11280*a(n-7) -1324*a(n-8) +39136*a(n-9) -12360*a(n-10) -67968*a(n-11) +39456*a(n-12) +46080*a(n-13) -34560*a(n-14)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A045132 A096702 A252621 * A252511 A250876 A165443

Adjacent sequences:  A234558 A234559 A234560 * A234562 A234563 A234564

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 28 2013

STATUS

approved

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Last modified February 18 02:57 EST 2020. Contains 332006 sequences. (Running on oeis4.)