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A223779
Number of nX4 0..1 arrays with row sums unimodal and column sums inverted unimodal
1
11, 155, 1809, 18368, 170596, 1467585, 11958241, 93143325, 701011531, 5122796281, 36580579223, 256023626995, 1763257257909, 11972451382991, 80358098290959, 533816210907730, 3516112638056226, 22982258501597895, 149261848394091779
OFFSET
1,1
COMMENTS
Column 4 of A223782
LINKS
EXAMPLE
Some solutions for n=3
..1..0..0..1....0..1..1..0....1..0..0..0....1..0..1..1....1..0..1..0
..1..0..1..1....1..0..1..1....1..1..1..1....1..1..1..0....1..0..0..0
..0..1..1..1....1..1..0..1....0..1..1..0....0..1..0..0....0..1..0..0
CROSSREFS
Sequence in context: A051608 A191369 A223713 * A191534 A243947 A156933
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved