OFFSET
1,1
COMMENTS
Column 1 of A183782.
a(n) appears to be sum of the elements of the n-th power of the matrix {{1, 2}, {2, 0}}. - Griffin N. Macris, Mar 25 2016
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = a(n-1) + 4*a(n-2).
EXAMPLE
Some solutions with a(1,1)=0 for 3X2
..0..1....0..0....0..1....0..1....0..1....0..0....0..0....0..1....0..0....0..0
..1..1....0..1....1..1....0..0....0..0....0..1....1..0....1..1....0..0....1..0
..1..1....0..0....1..0....1..0....0..0....1..1....1..1....0..1....0..0....0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 07 2011
STATUS
approved