A218194 Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..3 nX6 array.

57, 4001, 260205, 16703113, 1068969245, 68410191725, 4378092248621, 280189181606213, 17931584186079329, 1147588053510298689, 73443503055457761265, 4700247703823958214433, 300807117566919214489057

Offset

1,1

Comments

Column 6 of A218196

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A122533 A015259 A218808 * A218370 A218636 A218240

Adjacent sequences: A218191 A218192 A218193 * A218195 A218196 A218197

Keyword

nonn

Author

R. H. Hardin, Oct 23 2012

Status

approved