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A251013 Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the maximum of its antidiagonal elements 1
423, 6653, 105897, 1691169, 27018053, 431623476, 6895174650, 110149711356, 1759629989746, 28109907028935, 449052877687701, 7173573646078876, 114597102921635046, 1830676959844527106, 29244876577234599586 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A251019

LINKS

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

FORMULA

Empirical: a(n) = 27*a(n-1) -234*a(n-2) +1104*a(n-3) -3214*a(n-4) +5993*a(n-5) -7505*a(n-6) +6551*a(n-7) -3996*a(n-8) +1649*a(n-9) -385*a(n-10) -18*a(n-11) +47*a(n-12) -14*a(n-13) +a(n-14)

EXAMPLE

Some solutions for n=3

..2..1..0....2..2..1....0..0..1....2..0..0....0..0..2....2..0..1....2..1..2

..0..0..0....2..1..1....1..1..2....1..1..1....2..2..2....0..0..1....2..1..2

..2..2..2....1..1..0....2..2..1....0..1..0....0..0..0....2..2..2....0..0..1

..2..2..0....1..0..2....1..0..1....0..1..2....0..0..0....0..0..0....1..1..2

CROSSREFS

Sequence in context: A205831 A206408 A238174 * A230678 A091293 A114808

Adjacent sequences:  A251010 A251011 A251012 * A251014 A251015 A251016

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified January 26 13:42 EST 2022. Contains 350598 sequences. (Running on oeis4.)