OFFSET
1,1
COMMENTS
Column 5 of A222281
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..135
FORMULA
Empirical: a(n) = 1784*a(n-1) -372607*a(n-2) +28170251*a(n-3) -798596554*a(n-4) +1889917225*a(n-5) +177172468750*a(n-6) -651776500000*a(n-7)
EXAMPLE
Some solutions for n=2
..0..0..1..3..3....0..0..3..1..2....0..0..0..0..2....0..0..3..4..1
..2..0..2..5..3....0..4..4..1..2....1..3..0..1..3....2..3..0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2013
STATUS
approved