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A256764 Number of (n+2)X(1+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum 1
352, 1936, 9152, 43264, 189696, 831744, 3502080, 14745600, 60702720, 249892864, 1015758848, 4128833536, 16663379968, 67251011584, 270331805696, 1086664474624, 4358399852544, 17480694104064, 70025528475648 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A256771
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) -144*a(n-3) +272*a(n-4) +704*a(n-5) -2304*a(n-6) +5120*a(n-8) -4096*a(n-9)
EXAMPLE
Some solutions for n=4
..1..0..0....1..0..0....1..1..1....1..0..1....1..1..0....1..1..0....0..0..0
..1..1..0....0..0..1....0..0..0....0..0..0....1..0..0....1..0..0....0..1..0
..1..1..1....1..1..1....1..0..1....0..1..0....1..1..0....1..0..0....1..1..1
..0..0..0....0..0..1....0..1..0....1..0..1....0..0..0....1..1..1....1..1..1
..0..1..0....0..0..0....0..0..1....0..0..0....1..1..1....0..1..0....0..0..1
..1..0..1....0..0..1....1..0..1....0..0..1....1..1..1....0..1..1....0..0..0
CROSSREFS
Sequence in context: A235888 A256025 A256771 * A255501 A229740 A255500
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 09 2015
STATUS
approved

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Last modified June 12 19:52 EDT 2024. Contains 373360 sequences. (Running on oeis4.)