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A251196 Number of (n+1)X(3+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements 1
64, 310, 1654, 8976, 49104, 268638, 1470646, 8050116, 44068836, 241240750, 1320610882, 7229316556, 39574952216, 216642298190, 1185949599142, 6492159224596, 35539565353052, 194551710683166, 1065020576904442 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A251201

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 2*a(n-1) +19*a(n-2) +8*a(n-3) -41*a(n-4) -16*a(n-5) +21*a(n-6) -10*a(n-8) +2*a(n-9) for n>10

EXAMPLE

Some solutions for n=4

..1..1..1..0....1..0..1..0....1..1..1..1....1..1..0..1....1..1..1..0

..1..1..0..1....1..1..1..1....1..0..1..1....1..0..1..1....1..0..1..1

..1..1..1..1....1..1..1..0....1..1..0..1....1..1..1..0....1..1..1..0

..1..1..1..1....0..1..1..1....0..1..1..1....1..1..0..1....0..1..0..1

..1..0..1..0....1..1..1..1....1..0..1..1....1..1..1..1....1..1..1..0

CROSSREFS

Sequence in context: A299387 A299186 A299947 * A221486 A231942 A221686

Adjacent sequences:  A251193 A251194 A251195 * A251197 A251198 A251199

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified September 18 13:49 EDT 2020. Contains 337169 sequences. (Running on oeis4.)