A218595 Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 4Xn array

1, 191, 3567, 56629, 898763, 14313773, 228191491, 3638365943, 58007785937, 924827168901, 14744666323421, 235076662350533, 3747866807725781, 59752871465350263, 952650082055322631, 15188260508053833233

Offset

1,2

Comments

Row 4 of A218592

Links

R. H. Hardin, Table of n, a(n) for n = 1..162

Example

Some solutions for n=3
..0..0..1....1..0..0....1..1..0....0..1..1....0..0..1....0..1..1....1..0..0
..0..0..0....0..0..1....1..0..0....1..1..1....1..1..0....0..1..1....1..0..1
..1..0..1....1..0..0....1..0..1....1..1..0....1..1..0....1..1..0....0..0..1
..1..0..0....0..1..1....1..1..1....0..0..1....1..1..1....1..1..0....1..1..0

Crossrefs

Sequence in context: A061331 A177683 A209549 * A296580 A206860 A206954

Adjacent sequences: A218592 A218593 A218594 * A218596 A218597 A218598

Keyword

nonn

Author

R. H. Hardin Nov 03 2012

Status

approved