OFFSET
1,1
COMMENTS
Column 2 of A263973.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) +80*a(n-2) -135*a(n-3) -591*a(n-4) +752*a(n-5) -823*a(n-6) -415*a(n-7) +768*a(n-8) -81*a(n-9) -9*a(n-10)
EXAMPLE
Some solutions for n=4
..2..3..0....4..3..0....2..5..0....2..3..0....2..5..4....3..4..0....2..3..0
..6..1..7....5..2..1....7..1..3....6..7..1....0..1..8....6..2..1....1..6..7
..8..4..5....8.11..6...10..4..6....8..4..5....3.11..6....9.11..5....8..5..4
.12.13.14....7.13.14...11.13..8...12.14.13...12..7.13....7..8.13...11.12.13
..9.10.11...10..9.12...14..9.12....9.10.11...14..9.10...14.10.12...14..9.10
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 30 2015
STATUS
approved