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A233943 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 4 1
226, 2108, 19484, 180972, 1679760, 15596008, 144797048, 1344358636, 12481572704, 115884202944, 1075917803036, 9989276224648, 92744667508700, 861080754430716, 7994638246266868, 74225606014170660, 689141949817076692 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233949

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +9*a(n-2) -154*a(n-3) +24*a(n-4) +569*a(n-5) -305*a(n-6) -372*a(n-7) +163*a(n-8) +31*a(n-9) -6*a(n-10)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A031708 A156814 A251605 * A234155 A251402 A251395

Adjacent sequences:  A233940 A233941 A233942 * A233944 A233945 A233946

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified October 1 21:18 EDT 2022. Contains 357173 sequences. (Running on oeis4.)