OFFSET
1,1
COMMENTS
Column 7 of A251236.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical: a(n) = 13*a(n-1) -63*a(n-2) +122*a(n-3) +13*a(n-4) -371*a(n-5) +317*a(n-6) +308*a(n-7) -370*a(n-8) -144*a(n-9) +128*a(n-10) +48*a(n-11).
EXAMPLE
Some solutions for n=4:
..2..0..2..2..2..1..1..1....2..2..2..1..1..2..2..0....2..0..3..1..3..1..2..1
..1..3..1..1..1..2..2..2....1..1..1..2..2..1..1..3....2..2..1..1..1..1..2..1
..2..0..2..2..2..1..1..1....2..2..2..1..1..2..2..0....1..1..2..2..2..2..1..2
..2..2..2..0..2..1..3..1....1..1..1..2..2..1..1..3....3..1..2..0..2..0..3..0
..1..1..1..3..1..2..0..2....2..2..2..1..1..2..2..0....2..0..3..1..3..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved