OFFSET
1,1
COMMENTS
Column 1 of A238145
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 1808*a(n-4) +44640*a(n-6) +335068*a(n-8) -484208*a(n-10) -15068144*a(n-12) -32087616*a(n-14) +167504512*a(n-16) +586957568*a(n-18) -435685376*a(n-20) -3412492288*a(n-22) -1807720448*a(n-24) +6958792704*a(n-26) +9003270144*a(n-28) +190054400*a(n-30) -3628072960*a(n-32) -1132462080*a(n-34)
EXAMPLE
Some solutions for n=4
..2..1....1..0....3..2....2..0....0..3....0..1....2..1....1..3....2..3....0..3
..2..0....1..1....1..3....2..2....1..2....1..2....2..2....1..0....2..3....0..1
..1..3....3..1....3..3....1..2....3..1....1..1....0..0....2..2....3..3....2..3
..1..3....3..0....1..0....1..2....0..2....2..0....1..0....2..2....2..2....3..0
..0..3....3..2....2..2....0..2....0..3....2..2....1..1....3..3....0..0....3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 18 2014
STATUS
approved