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A218419
Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 n X n array
1
1, 13, 357, 41515, 19003811, 34328798853, 245489633250861, 6942897327251230265, 776657742366634012014603, 343639983448734808976866431015, 601395784904377113605427806277106571
OFFSET
1,2
COMMENTS
Diagonal of A218426
LINKS
EXAMPLE
Some solutions for n=3
..1..1..1....1..1..0....1..1..1....0..0..0....0..1..1....1..1..0....0..1..0
..0..1..1....0..1..0....1..1..1....1..1..0....0..1..1....1..0..1....1..0..0
..1..0..1....0..1..1....0..1..1....1..1..0....0..0..1....0..0..0....1..1..1
CROSSREFS
Sequence in context: A297070 A220636 A078738 * A165391 A061015 A330255
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 28 2012
STATUS
approved