A237011 - OEIS

A237011

Number of (n+1)X(4+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal

5984, 10776, 20776, 46416, 108824, 282048, 755752, 2169408, 6387224, 19785696, 62577256, 205965696, 689940824, 2386495968, 8375807272, 30155605248, 109803847064, 407743384416, 1526506024936, 5798829806976, 22150030731224

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OFFSET

1,1

COMMENTS

Column 4 of A237015

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +16*a(n-2) -268*a(n-3) +189*a(n-4) +3388*a(n-5) -5824*a(n-6) -20048*a(n-7) +49756*a(n-8) +52752*a(n-9) -196896*a(n-10) -24192*a(n-11) +369216*a(n-12) -131328*a(n-13) -262656*a(n-14) +165888*a(n-15)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A282191 A328327 A364861 * A274362 A233871 A182295

Adjacent sequences: A237008 A237009 A237010 * A237012 A237013 A237014

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 02 2014

STATUS

approved