OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 184*a(n-1) - 8533*a(n-2) + 122786*a(n-3) - 563036*a(n-4) + 700280*a(n-5).
Empirical g.f.: x*(1 - 152*x + 4739*x^2 - 34208*x^3 + 52740*x^4) / ((1 - 2*x)*(1 - 5*x)*(1 - 14*x)*(1 - 41*x)*(1 - 122*x)). - Colin Barker, Jan 11 2019
EXAMPLE
Some solutions for n=3:
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..1..0..1..0..0....0..1..1..1..1..1....0..1..0..1..0..0....0..1..0..0..0..1
..0..0..1..2..1..1....0..0..1..2..2..1....0..0..0..0..0..1....0..1..1..1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved