OFFSET
1,1
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 4's, every 2 is next to 2 0's, every 3 is next to 3 0's, every 4 is next to 4 1's
Column 3 of A197098
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 3*a(n-1) +5*a(n-2) +16*a(n-3) +26*a(n-4) +32*a(n-5) -2*a(n-6) +2*a(n-7) -30*a(n-8) +7*a(n-9) -3*a(n-10) +a(n-11) +a(n-12) -a(n-13)
EXAMPLE
Some solutions for n=4
..2..0..0....2..0..0....0..0..0....2..0..2....0..0..2....0..3..0....0..2..0
..0..0..2....0..0..0....0..0..3....0..0..0....2..3..0....2..0..0....0..2..2
..0..0..2....0..0..0....3..0..0....2..3..0....0..0..0....2..0..0....0..0..0
..0..3..0....0..0..2....0..0..0....0..0..0....0..3..0....0..0..2....0..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved