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A251006
Number of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than the absolute difference of its antidiagonal elements
1
31456, 4434257, 623999793, 87861924805, 12371981931569, 1742128826665123, 245313779556192507, 34543306613978027778, 4864137868972651779283, 684932598992197164031725, 96447238828788270436907235
OFFSET
1,1
COMMENTS
Column 4 of A251010
FORMULA
Empirical recurrence of order 87 (see link above)
EXAMPLE
Some solutions for n=1
..2..2..2..2..2....0..1..2..2..1....2..2..2..0..0....0..2..0..0..1
..1..1..1..1..0....0..1..2..0..0....1..2..1..0..2....2..1..0..1..0
CROSSREFS
Sequence in context: A277171 A258577 A303531 * A113846 A321054 A234205
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved