OFFSET
0,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
EXAMPLE
The a(2) = 13 matrices are:
[1 1] [1 1] [1 0] [1 0] [0 1] [0 1]
[1 0] [0 1] [1 1] [0 1] [1 1] [1 0]
[0 1] [1 0] [0 1] [1 1] [1 0] [1 1]
.
[2 1] [2 0] [1 2] [1 0] [0 2] [0 1] [2 2]
[0 1] [0 2] [1 0] [1 2] [2 0] [2 1]
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jan 23 2020
STATUS
approved