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A233711 Number of (n+1)X(2+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 14 1
444, 2624, 16004, 103152, 662008, 4295540, 27795204, 180350552, 1168954616, 7582779720, 49168291852, 318905004000, 2068080647336, 13412883513792, 86985009407852, 564144460317336, 3658633254225680, 23727980069413580 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233717

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +56*a(n-2) -565*a(n-3) -766*a(n-4) +15139*a(n-5) -7664*a(n-6) -200684*a(n-7) +302993*a(n-8) +1413766*a(n-9) -3297757*a(n-10) -5115754*a(n-11) +18205660*a(n-12) +6468818*a(n-13) -56612688*a(n-14) +15267568*a(n-15) +100195210*a(n-16) -68399612*a(n-17) -95039845*a(n-18) +102899681*a(n-19) +36863396*a(n-20) -73128319*a(n-21) +5984214*a(n-22) +22126722*a(n-23) -7453432*a(n-24) -1251600*a(n-25) +860624*a(n-26) -95168*a(n-27)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A128675 A250075 A043507 * A251294 A233377 A098255

Adjacent sequences:  A233708 A233709 A233710 * A233712 A233713 A233714

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 2013

STATUS

approved

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Last modified August 20 06:04 EDT 2019. Contains 326139 sequences. (Running on oeis4.)