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