OFFSET
1,1
COMMENTS
Diagonal of A231977
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for n=2
..1..0..0....0..0..0....0..0..1....0..0..1....1..0..0....0..0..0....0..1..0
..0..0..0....1..1..1....1..0..0....1..0..1....1..0..0....0..0..0....0..0..0
..0..0..1....0..0..0....0..0..0....0..0..0....0..0..0....0..1..1....0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2013
STATUS
approved