OFFSET
1,1
COMMENTS
Row 3 of A223269.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 24*a(n-1) + 256*a(n-2) - 1024*a(n-3) for n>4.
Empirical g.f.: 4*x*(9 - 72*x - 512*x^2 + 2048*x^3) / (1 - 24*x - 256*x^2 + 1024*x^3). - Colin Barker, Aug 18 2018
EXAMPLE
Some solutions for n=3:
..0..2..5....0..2..1....0..1..0....0..1..0....0..1..5....0..2..0....0..1..5
..0..2..0....4..3..1....0..3..0....5..3..5....0..1..0....5..1..0....0..3..5
..4..3..4....0..2..1....0..4..5....4..2..0....2..4..3....0..3..5....5..3..1
Face neighbors:
0.->.1.2.3.4
1.->.0.2.3.5
2.->.0.1.4.5
3.->.0.1.4.5
4.->.0.3.2.5
5.->.1.3.4.2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 19 2013
STATUS
approved