OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 32*a(n-1) + 64*a(n-2) - 3072*a(n-3) + 8192*a(n-4) for n>5.
Empirical g.f.: x*(11 - 272*x - 576*x^2 + 20992*x^3 - 53248*x^4) / ((1 - 8*x)*(1 - 24*x - 256*x^2 + 1024*x^3)). - Colin Barker, Oct 10 2018
EXAMPLE
Some solutions for n=4:
..0..1..0..4....0..1..5..2....0..1..0..2....0..1..0..1....0..1..2..1
..5..1..5..2....5..1..0..4....3..1..5..1....2..1..5..4....5..1..0..4
..0..4..5..2....3..1..0..4....2..1..5..1....5..1..0..1....5..4..5..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 05 2013
STATUS
approved