A218814 Hilltop maps: number of 5Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 5Xn array.

1, 895, 30719, 1015887, 32496361, 1039681033, 33267198605, 1064504791361, 34063123433881, 1089988059800483, 34878608200880007, 1116083095298367751, 35713623091879803585, 1142802788086214384757, 36568628416225846226213

Offset

1,2

Comments

Row 5 of A218810

Links

R. H. Hardin, Table of n, a(n) for n = 1..73

Example

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

Crossrefs

Sequence in context: A210007 A251315 A387837 * A264329 A287944 A323964

Adjacent sequences: A218811 A218812 A218813 * A218815 A218816 A218817

Keyword

nonn

Author

R. H. Hardin, Nov 06 2012

Status

approved