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A234879 Number of (n+1)X(5+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
512, 1188, 2096, 6364, 12208, 44348, 87312, 354132, 703104, 3038716, 6051952, 27075444, 53993296, 245985516, 490821440, 2257240564, 4505154032, 20819580220, 41558674736, 192537441668, 384356619712, 1783019060604, 3559512651120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A234882

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +34*a(n-2) -34*a(n-3) -490*a(n-4) +490*a(n-5) +3953*a(n-6) -3953*a(n-7) -19806*a(n-8) +19806*a(n-9) +64568*a(n-10) -64568*a(n-11) -139460*a(n-12) +139460*a(n-13) +199324*a(n-14) -199324*a(n-15) -184736*a(n-16) +184736*a(n-17) +105888*a(n-18) -105888*a(n-19) -33888*a(n-20) +33888*a(n-21) +4608*a(n-22) -4608*a(n-23)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A043423 A045058 A220017 * A202454 A230543 A224651

Adjacent sequences:  A234876 A234877 A234878 * A234880 A234881 A234882

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

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Last modified December 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)