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A205625
Number of (n+1)X8 0..2 arrays with every 2X2 subblock in a row having an equal number of equal diagonal or equal antidiagonal elements, adjacent rows differing in this number, and new values 0..2 introduced in row major order
1
49154, 1284960, 42094188, 1324746888, 43439036364, 1367618567424, 44843430265344, 1412066783037696, 46294475000952672, 1457966169381319680, 47792560548918834432, 1505356985323702193664, 49339149731535883131648
OFFSET
1,1
COMMENTS
Column 7 of A205626
LINKS
FORMULA
Empirical: a(n) = 1032*a(n-2) +144*a(n-3) -3000*a(n-4) -29184*a(n-5) -260224*a(n-6) -294912*a(n-7) -12539904*a(n-8) -218824704*a(n-10) -2415919104*a(n-12) for n>13
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..1..1....0..0..1..1..1..1..0..0....0..0..1..2..0..0..1..2
..1..1..1..1..1..2..2..0....0..1..1..2..1..2..1..0....1..2..1..2..1..2..1..0
..0..1..2..1..2..2..0..1....2..2..0..0..0..2..1..2....0..1..0..1..0..1..0..2
..0..1..0..0..0..1..0..2....2..0..1..0..1..0..2..2....0..1..2..2..2..1..0..1
..0..0..2..0..2..0..2..1....1..0..2..2..1..0..1..0....0..0..1..2..0..2..1..2
CROSSREFS
Sequence in context: A331355 A204627 A079400 * A205360 A045085 A304020
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 29 2012
STATUS
approved