OFFSET
1,2
COMMENTS
Column 1 of A209178
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -5*a(n-2) +6*a(n-3) -14*a(n-4) +21*a(n-5) -36*a(n-6) +80*a(n-7) -97*a(n-8) +80*a(n-9) -86*a(n-10) +109*a(n-11) -49*a(n-12) -53*a(n-13) +137*a(n-14) -123*a(n-15) +86*a(n-16) -193*a(n-17) +172*a(n-18) -118*a(n-19) -50*a(n-20) +59*a(n-21) -161*a(n-22) +255*a(n-23) -218*a(n-24) +448*a(n-25) -280*a(n-26) +177*a(n-27) -132*a(n-28) +33*a(n-29) -88*a(n-30) +128*a(n-31) -22*a(n-32) -13*a(n-33) +61*a(n-34) -79*a(n-35) +33*a(n-36) -21*a(n-37) +8*a(n-38) -3*a(n-39) +4*a(n-40) -4*a(n-41) +a(n-42) -a(n-43)
EXAMPLE
Some solutions for n=8
..3....3....2....0....0....0....0....2....3....1....2....0....1....0....0....0
..0....0....2....1....2....2....1....2....1....1....0....3....1....3....1....1
..2....2....2....1....0....0....1....2....1....1....2....0....0....1....1....1
..3....3....2....0....2....2....1....2....3....1....3....0....1....1....3....1
..2....2....2....0....0....2....1....1....0....0....2....3....1....3....1....1
..1....0....1....1....0....2....2....1....0....2....0....2....1....2....1....1
..1....1....1....1....1....2....0....0....1....0....3....0....1....0....3....0
..1....1....1....1....1....2....2....0....1....2....0....2....1....2....0....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2012
STATUS
approved