OFFSET
1,2
COMMENTS
Column 2 of A263424.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +4*a(n-2) +22*a(n-3) +14*a(n-4) -93*a(n-5) -68*a(n-6) +52*a(n-7) +32*a(n-8) +36*a(n-9) +45*a(n-10) -16*a(n-11) +8*a(n-12) -6*a(n-13) -2*a(n-14) +a(n-15).
EXAMPLE
Some solutions for n=4
..0..5....3..5....0..5....3..1....0..5....3..2....0..1....0..5....4..1....3..2
..1..4....1..7....1..4....6..0....1..3....6..4....2..3....1..3....5..0....5..0
..7..2....0..6....7..6....4..2....7..6....0..1....4..5....4..2....3..6....4..1
..6..3....2..4....2..3....5..7....2..4....5..7....6..7....6..7....2..7....6..7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 17 2015
STATUS
approved