OFFSET
1,1
COMMENTS
Column 4 of A212930
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 405*a(n-1) -43860*a(n-2) +1524160*a(n-3) -15636480*a(n-4) +14155776*a(n-5).
Empirical: a(n) = -3*96^n+256^n+36^n-1+2*16^n. R. J. Mathar, Jun 27 2012
EXAMPLE
Some solutions for n=3
..3..1..1..1....0..1..1..3....1..0..2..3....2..0..3..0....1..3..2..2
..3..3..3..1....3..0..3..1....2..1..1..0....0..2..1..1....0..2..2..1
..3..1..3..3....1..3..2..1....3..3..0..1....0..2..1..0....1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 31 2012
STATUS
approved