A233151 Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally

3, 24, 432, 17496, 1658232, 367125912, 191184793128, 234385100907480, 677856222475099560, 4627785508146660629232, 74650443539914896103253016, 2846446729148572555427535908448, 256684477494955879310882598953790768

Offset

1,1

Comments

Diagonal of A233155

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A193210 A065761 A002832 * A236466 A185970 A279165

Adjacent sequences: A233148 A233149 A233150 * A233152 A233153 A233154

Keyword

nonn

Author

R. H. Hardin, Dec 05 2013

Status

approved