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A208708
Number of nX7 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors
1
64, 4516, 334948, 24754628, 1830045552, 135288700496, 10001404535216, 739367693888784, 54658781788350480, 4040726220144359312, 298716287704524626960, 22083015695332916533648, 1632517550173528777448208
OFFSET
1,1
COMMENTS
Column 7 of A208709
LINKS
FORMULA
Empirical: a(n) = 83*a(n-1) -710*a(n-2) +3004*a(n-3) -7952*a(n-4) +16752*a(n-5) -27360*a(n-6) +33984*a(n-7) -26368*a(n-8) for n>10
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..1..0....0..0..1..0..1..1..1....0..0..0..0..0..1..1
..0..1..1..0..1..1..0....0..0..1..1..0..1..1....0..1..0..1..1..0..1
..1..0..0..0..1..0..0....0..1..0..0..1..0..0....1..1..1..0..0..1..0
..1..1..0..1..0..1..0....0..0..1..0..0..1..1....0..1..0..1..1..1..1
CROSSREFS
Sequence in context: A264345 A099369 A249393 * A189957 A146496 A058874
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved