OFFSET
1,1
COMMENTS
Column 7 of A248461
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) +9*a(n-2) -2*a(n-3) -109*a(n-4) -203*a(n-5) -4*a(n-6) +520*a(n-7) +1012*a(n-8) +696*a(n-9) +385*a(n-10) +373*a(n-11) -514*a(n-12) -2737*a(n-13) -4627*a(n-14) -3396*a(n-15) -2854*a(n-16) -3670*a(n-17) -2204*a(n-18) -634*a(n-19) -332*a(n-20) -162*a(n-21) -24*a(n-22)
EXAMPLE
Some solutions for n=4
..0....4....7....2....1....2....0....6....1....7....0....4....1....4....0....0
..4....5....0....4....4....5....0....5....4....2....1....5....0....7....2....1
..4....2....7....5....0....6....3....5....1....0....4....2....7....3....7....5
..3....4....4....4....5....1....2....6....4....2....3....2....1....1....6....1
..7....7....3....0....6....5....6....0....1....2....7....7....5....0....6....2
..1....0....6....5....0....7....5....2....6....3....6....1....0....1....1....7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 06 2014
STATUS
approved