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A278776
Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.
1
21, 1750, 48501, 955347, 16205001, 251740932, 3634987413, 48847405083, 611199661843, 7140933364136, 78280456105686, 809842005695656, 7953581118077240, 74557744904209329, 670158115881138987
OFFSET
1,1
COMMENTS
Column 6 of A278778.
FORMULA
Empirical polynomial of degree 134 (see link above)
EXAMPLE
Some solutions for n=3
..1..0..0..0..1..1. .1..0..0..1..1..0. .1..0..1..1..1..1. .0..0..0..1..0..0
..0..1..0..0..1..1. .0..1..0..1..0..0. .1..1..1..1..1..0. .1..1..0..1..0..1
..1..1..0..0..1..1. .1..0..1..0..0..0. .0..0..0..0..0..0. .1..1..1..0..1..1
CROSSREFS
Cf. A278778.
Sequence in context: A221033 A221497 A155740 * A296597 A203327 A375065
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 28 2016
STATUS
approved