OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 66*a(n-1) - 1021*a(n-2) - 2244*a(n-3) - 1156*a(n-4) for n>5.
Conjectures from Colin Barker, Jan 30 2019: (Start)
G.f.: 8*x*(1 - x)^2*(1 + 116*x + 4*x^2) / ((1 + x)^2*(1 - 34*x)^2).
a(n) = (48*(-383214*(-1)^n - 2660911*34^n + 35*(363562*(-1)^n + 115797*34^n)*n)) / 210644875 for n>1.
(End)
EXAMPLE
Some solutions for n=3:
..5..0. .3..3. .7..3. .2..2. .2..3. .5..7. .6..5. .5..3. .3..6. .6..3
..1..0. .0..7. .6..5. .4..3. .1..0. .4..3. .6..6. .4..1. .2..1. .4..0
..6..5. .1..1. .2..6. .7..6. .4..6. .7..5. .3..4. .5..5. .3..1. .0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 12 2016
STATUS
approved