A231256 Number of (n+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.

2, 15, 304, 19503, 3130708, 1350570015, 1496478177166, 4339950773804841, 32510127329051575349, 631327524382609726232392, 31694391041907948471880253567

Offset

1,1

Comments

Diagonal of A231263

Links

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

Example

Some solutions for n=3
..0..0..0..0....0..0..1..1....0..0..1..1....0..0..0..0....0..0..0..1
..1..1..1..1....0..1..1..2....0..1..1..2....1..1..0..0....0..0..1..0
..2..2..2..2....2..2..2..0....1..2..2..0....1..2..2..0....1..1..0..2
..1..1..1..1....2..2..0..0....2..2..0..0....2..2..0..0....0..0..2..2

Crossrefs

Sequence in context: A372312 A264703 A262961 * A304120 A255929 A381988

Adjacent sequences: A231253 A231254 A231255 * A231257 A231258 A231259

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved