OFFSET
1,2
COMMENTS
Column 3 of A264583.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-2) +10*a(n-3) +4*a(n-4) -4*a(n-5) -33*a(n-6) +4*a(n-7) +25*a(n-9) -8*a(n-10) +4*a(n-11) -10*a(n-12) -2*a(n-14) +a(n-15)
EXAMPLE
Some solutions for n=4
..1..2..5..6....1..2..3..6....1..2..3..6....1..2..5..6....1..2..5..6
..0..8..7..3....0..8..7.10....0..8..7.10....0..8..7..3....0..8..7..3
..9.12..4.14....4..5.11.14....9..5..4.14....4.12.11.14....4.10.11.14
.13.16.10.11...13.16.17..9...13.16.17.11...13.16.10..9...13.16.17..9
.17.18.19.15...12.18.19.15...12.18.19.15...17.18.19.15...12.18.19.15
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 18 2015
STATUS
approved