OFFSET
1,2
COMMENTS
Row 2 of A221655
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical: a(n) = 9*a(n-1) -15*a(n-2) -15*a(n-3) +52*a(n-4) -51*a(n-5) -a(n-6) +127*a(n-7) -32*a(n-8) -28*a(n-9) +25*a(n-10) for n>12
EXAMPLE
Some solutions for n=3
..1..2..0....1..3..1....1..3..0....1..2..0....1..4..1....0..0..0....0..4..1
..1..2..0....0..1..0....0..1..1....0..2..1....0..0..0....1..4..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 21 2013
STATUS
approved