OFFSET
1,1
COMMENTS
Column 7 of A223202
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7040*a(n-1) -18169856*a(n-2) +23760732160*a(n-3) -18040473255936*a(n-4) +8500736711196672*a(n-5) -2561598209927413760*a(n-6) +496452053123372941312*a(n-7) -61015776557932010799104*a(n-8) +4604307320797904083353600*a(n-9) -203533995411681708710297600*a(n-10) +5009788596483023299982393344*a(n-11) -63134942003554394019855335424*a(n-12) +316912650057057350374175801344*a(n-13)
EXAMPLE
Some solutions for n=3
..0..3..0..3..1..3..5....0..3..0..3..0..3..1....0..3..0..3..0..2..0
..3..0..3..0..2..0..2....3..0..3..0..3..0..2....3..0..3..0..3..5..1
..0..3..0..3..4..3..0....0..3..0..3..0..3..5....0..3..0..4..0..1..0
Face neighbors:
0,5 -> 1 2 3 4
1,4 -> 0 2 3 5
2,3 -> 0 1 4 5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 18 2013
STATUS
approved