A218809 Hilltop maps: number of nX7 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 nX7 array

113, 15871, 2030789, 259935681, 33267198605, 4257699787069, 544920898689805, 69741601368666737, 8925866282195274093, 1142375383410178607437, 146206707061580643526877, 18712238989313795368235025

Offset

1,1

Comments

Column 7 of A218810

Links

R. H. Hardin, Table of n, a(n) for n = 1..156

Example

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

Crossrefs

Sequence in context: A175687 A090480 A187632 * A218195 A218371 A218637

Adjacent sequences: A218806 A218807 A218808 * A218810 A218811 A218812

Keyword

nonn

Author

R. H. Hardin Nov 06 2012

Status

approved