OFFSET
1,1
COMMENTS
Column 4 of A246737
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +a(n-4) +24*a(n-5) +2*a(n-6) +5*a(n-7) +11*a(n-8) -8*a(n-10) -2*a(n-11) +3*a(n-12) +a(n-15) +a(n-16)
EXAMPLE
Some solutions for n=4
..3....3....4....0....1....2....1....3....3....1....4....4....4....2....0....1
..2....0....1....3....1....0....1....3....0....0....2....1....1....0....2....4
..3....2....4....2....1....3....1....3....0....0....1....4....4....0....1....4
..4....0....2....3....0....3....4....0....3....0....1....4....4....3....1....2
..4....0....4....0....0....0....1....3....3....0....4....1....1....0....0....1
..3....0....4....0....2....0....1....2....3....1....1....1....2....3....0....1
..2....0....4....3....0....0....2....0....2....0....2....1....1....3....0....4
..4....2....3....2....0....0....1....0....3....0....1....1....1....3....2....4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 02 2014
STATUS
approved