

A204948


Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..2 introduced in row major order


1



4041, 41353, 457852, 4566666, 48128792, 523821125, 5530809140, 58869604914, 631407564661, 6728446852074, 71782201831466, 767149995946511, 8188160552795512, 87406003728948696, 933400577286373617
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



