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A184225 Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3 1
180, 2318, 20958, 224156, 2227254, 22904858, 231988508, 2366228756, 24059229300, 244980260166, 2492868966664, 25374399195344, 258246420327078, 2628446232292538, 26751738752624652, 272276599065597038 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A184231
LINKS
FORMULA
Empirical: a(n)=10*a(n-1)+24*a(n-2)-241*a(n-3)+55*a(n-4)+1084*a(n-5)-594*a(n-6)-1710*a(n-7)+1050*a(n-8)+928*a(n-9)-552*a(n-10)-132*a(n-11)+72*a(n-12)
EXAMPLE
Some solutions for 3X4
..3..0..3..2....2..0..3..1....3..0..3..2....1..0..2..1....3..0..3..0
..0..3..0..3....0..3..0..2....1..3..0..3....0..3..0..3....0..2..0..2
..1..0..2..1....2..0..3..0....2..0..2..0....3..0..3..0....3..0..3..1
CROSSREFS
Sequence in context: A154672 A211556 A364162 * A099106 A179721 A112068
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 10 2011
STATUS
approved

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Last modified June 16 23:34 EDT 2024. Contains 373432 sequences. (Running on oeis4.)