A218195 - OEIS

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A218195

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

113, 16001, 2081511, 267240217, 34205771911, 4378092248621, 560375293762217, 71725802085285473

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 7 of A218196

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

..0..0..0..0..0..1..0....0..0..1..1..0..1..1....0..0..1..1..1..1..1

..0..0..1..0..1..1..1....0..1..1..1..0..1..0....0..0..0..1..0..0..1

..0..0..0..1..0..0..0....0..0..0..1..0..0..1....0..1..0..0..1..1..0

CROSSREFS

Sequence in context: A090480 A187632 A218809 * A218371 A218637 A218241

Adjacent sequences: A218192 A218193 A218194 * A218196 A218197 A218198

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 23 2012

STATUS

approved