OFFSET
1,2
COMMENTS
Row 3 of A264476.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +10*a(n-3) -4*a(n-4) +8*a(n-5) -25*a(n-6) -4*a(n-8) +33*a(n-9) +4*a(n-10) -4*a(n-11) -10*a(n-12) -2*a(n-13) +a(n-15)
EXAMPLE
Some solutions for n=4
..6..0..1..9..3....6..7..8..9..3....6..0..8..9..3....6..0..1..2..3
.11..5..2.14..4...11.12..2.14..4...11..5..2.14..4...11.12.13.14..4
.16.17.18.19.13....5..0..1.19.13...16.17..1.19.13....5.17.18.19..9
.10.15.12..7..8...10.15.16.17.18...10.15.12..7.18...10.15.16..7..8
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 14 2015
STATUS
approved