OFFSET
1,2
COMMENTS
Column 5 of A268079.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 275*a(n-1) -33566*a(n-2) +2406402*a(n-3) -113010337*a(n-4) +3670826083*a(n-5) -84876036304*a(n-6) +1415919602008*a(n-7) -17080706925232*a(n-8) +147810424834032*a(n-9) -899681247349760*a(n-10) +3716228243456000*a(n-11) -9782712920320000*a(n-12) +14560347732480000*a(n-13) -9122816102400000*a(n-14)
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..1..1..1..1....0..1..1..1..0....0..0..0..0..1....0..1..1..1..1
..0..0..1..0..1....0..1..1..0..1....0..0..1..0..2....0..1..2..1..0
..0..1..2..1..0....0..1..2..0..1....0..0..1..0..0....0..1..2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved