OFFSET
1,1
COMMENTS
Column 2 of A252473
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) +7*a(n-3) +7*a(n-4) +7*a(n-5) +4*a(n-6) -2*a(n-7) -4*a(n-8) -9*a(n-9) -8*a(n-10) -7*a(n-11) -3*a(n-12) +a(n-13) +3*a(n-14) +2*a(n-15) +a(n-16) for n>21
EXAMPLE
Some solutions for n=4
..2..2..0..0....2..0..2..0....1..3..3..3....3..1..3..3....3..3..3..3
..1..0..1..0....0..0..2..2....3..3..1..3....1..3..3..3....3..3..3..3
..1..0..0..1....2..2..0..0....3..3..3..3....3..3..3..3....1..3..3..1
..0..1..0..1....0..0..2..2....3..1..3..3....3..3..3..1....3..3..3..3
..0..0..2..2....2..2..0..0....3..3..3..1....3..3..3..3....3..3..3..3
..1..1..2..1....0..2..0..2....3..3..1..0....3..3..3..3....3..1..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved