OFFSET
0,3
EXAMPLE
The a(2) = 5 matrices are:
[0 0 0 2] [0 0 0 2] [0 0 1 1] [0 0 1 1] [0 0 1 1]
[0 0 2 0] [0 1 1 0] [0 0 1 1] [0 1 0 1] [0 2 0 0]
[0 2 0 0] [0 1 1 0] [1 1 0 0] [1 0 1 0] [1 0 0 1]
[2 0 0 0] [2 0 0 0] [1 1 0 0] [1 1 0 0] [1 0 1 0]
.
The a(3) = 12 matrices are:
[0 0 0 3] [0 0 1 2] [0 0 1 2] [0 0 1 2] [0 0 1 2] [0 1 1 1]
[0 0 3 0] [0 0 2 1] [0 1 1 1] [0 1 2 0] [0 2 1 0] [1 0 1 1]
[0 3 0 0] [1 2 0 0] [1 1 1 0] [1 2 0 0] [1 1 0 1] [1 1 0 1]
[3 0 0 0] [2 1 0 0] [2 1 0 0] [2 0 0 1] [2 0 1 0] [1 1 1 0]
.
[0 0 0 3] [0 0 1 2] [0 0 1 2] [0 0 1 2] [0 1 1 1] [1 0 1 1]
[0 1 2 0] [0 2 1 0] [0 3 0 0] [0 3 0 0] [1 1 0 1] [0 3 0 0]
[0 2 1 0] [1 1 1 0] [1 0 1 1] [1 0 2 0] [1 0 2 0] [1 0 1 1]
[3 0 0 0] [2 0 0 1] [2 0 1 0] [2 0 0 1] [1 1 0 1] [1 0 1 1]
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Apr 08 2020
STATUS
approved