OFFSET
1,1
COMMENTS
Column 7 of A264017.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 130*a(n-1) -1191*a(n-2) +13340*a(n-3) -146501*a(n-4) -159459*a(n-5) -1321*a(n-6) +1321*a(n-7) +159459*a(n-8) +146501*a(n-9) -13340*a(n-10) +1191*a(n-11) -130*a(n-12) +a(n-13) for n>15.
EXAMPLE
Some solutions for n=2
..0.11.20..3.14.15..6..7....0..1.12..3.22..5..6..7...10..1..2..3.14.15..6..7
.18..9.10..1.22.13..4..5....8..9.20.11..2.23.14.15...18..9..0.21.12.23..4..5
.16.17..8.19..2.21.12.23...16.17.18.19.10.21..4.13...16.17..8.19.20.11.22.13
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 01 2015
STATUS
approved