OFFSET
1,2
COMMENTS
Column 1 of A202916
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -28*a(n-2) +84*a(n-3) -126*a(n-4) +252*a(n-5) -210*a(n-6) +330*a(n-7) -165*a(n-8) +220*a(n-9) -66*a(n-10) +78*a(n-11) -13*a(n-12) +14*a(n-13) -a(n-14) +a(n-15)
EXAMPLE
Some solutions for n=4
..2....0....2....3....6....4....6....2....7....4....6....2....1....6....4....3
..6....5....2....3....6....7....6....3....7....4....6....6....4....7....4....3
..6....5....3....4....3....7....5....7....2....7....5....6....4....7....0....1
..4....2....3....4....0....3....0....7....0....7....2....2....0....0....0....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2011
STATUS
approved