A280123 Number of nX7 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

36, 776, 11249, 171100, 2433834, 33510642, 454149404, 6104734752, 81402597805, 1075306882708, 14114438688517

Offset

1,1

Comments

Column 7 of A280124.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
..0..0..0..0..0..0..0. .0..0..1..1..1..2..0. .0..0..1..1..1..1..1
..0..0..0..0..1..0..0. .0..1..1..1..0..0..0. .0..0..1..1..2..1..1
..0..0..1..1..1..2..2. .1..1..1..0..0..1..1. .0..1..1..2..2..0..0
..0..1..1..1..2..2..2. .1..1..0..0..1..1..1. .1..1..2..2..0..0..0

Crossrefs

Cf. A280124.

Sequence in context: A144941 A036084 A265194 * A004338 A228331 A014772

Adjacent sequences: A280120 A280121 A280122 * A280124 A280125 A280126

Keyword

nonn

Author

R. H. Hardin, Dec 26 2016

Status

approved