OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000 (terms n = 1..192 from R. H. Hardin)
FORMULA
a(n) = a(n-3) +2*a(n-6) +a(n-9) -4*a(n-12) -5*a(n-15) +4*a(n-18) +5*a(n-21) +a(n-24) -6*a(n-27) +6*a(n-33) -a(n-36) -5*a(n-39) -4*a(n-42) +5*a(n-45) +4*a(n-48) -a(n-51) -2*a(n-54) -a(n-57) +a(n-60).
EXAMPLE
Some solutions for n=5
..0..0..0..1....0..0..0..2....0..0..0..0....0..0..0..1....0..0..1..1
..0..0..1..1....0..1..1..2....0..0..1..1....0..0..1..2....0..0..1..1
..0..0..1..2....0..1..1..2....0..1..2..2....0..1..2..2....0..0..2..2
..1..1..2..2....0..1..2..2....1..1..2..2....0..1..2..2....0..1..2..2
..2..2..2..2....0..1..2..2....1..1..2..2....1..1..2..2....1..1..2..2
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Nov 29 2011
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Mar 18 2024
STATUS
approved