OFFSET
1,1
COMMENTS
Column 5 of A228218
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..189
FORMULA
Empirical: a(n) = 11*a(n-1) -30*a(n-2) for n>11
EXAMPLE
Some solutions for n=4
..1....2...-1...-7...-4..-10...-6....1....2....8...-3....2...-6...-3....5....6
.-4....2...-3....5....0....8....5....2...-5...-2....1...-2....8....0...-3...-9
..1...-2...-1...-1....7...-3....2....0....4...-3....4....6...-1....3...-1....5
..5....3....6....2...-5...-2...-3....5....3....5...-8...-5...-5...-1....6....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 16 2013
STATUS
approved