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A205904
Number of (n+1)X4 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same
1
1764, 24045, 327501, 4541781, 63696738, 900968550, 12813949461, 182896937223, 2616373388967, 37480339156782, 537385377081930, 7709105507436804, 110628756167804304, 1587897993004527084, 22794662152538771142
OFFSET
1,1
COMMENTS
Column 3 of A205909
LINKS
FORMULA
Empirical: a(n) = 29*a(n-1) -230*a(n-2) -305*a(n-3) +11727*a(n-4) -49396*a(n-5) +5444*a(n-6) +515772*a(n-7) -1409760*a(n-8) +86551*a(n-9) +7096107*a(n-10) -16531052*a(n-11) +15251786*a(n-12) +1909440*a(n-13) -19513805*a(n-14) +19659411*a(n-15) -4800430*a(n-16) -9042857*a(n-17) +12258669*a(n-18) -7003400*a(n-19) +708918*a(n-20) +1799474*a(n-21) -1404920*a(n-22) +462715*a(n-23) +42533*a(n-24) -69882*a(n-25) +21674*a(n-26) -4628*a(n-27) +416*a(n-28)
EXAMPLE
Some solutions for n=4
..1..0..0..2....2..0..2..2....1..2..0..2....1..2..0..0....1..0..2..0
..1..1..2..2....2..2..2..1....0..2..1..0....2..0..2..1....1..0..0..0
..0..1..2..0....0..0..1..1....1..0..2..1....2..1..0..2....2..2..0..1
..0..1..2..2....1..0..1..0....2..1..0..2....0..2..1..0....2..0..0..0
..0..1..1..1....0..0..0..0....0..2..1..0....1..0..2..1....2..0..1..1
CROSSREFS
Sequence in context: A165678 A205912 A237781 * A061627 A232554 A111886
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 01 2012
STATUS
approved