OFFSET
1,1
COMMENTS
Column 4 of A260001
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-2) +10*a(n-3) +25*a(n-4) -27*a(n-5) -99*a(n-6) -107*a(n-7) -136*a(n-8) +291*a(n-9) +668*a(n-10) +342*a(n-11) +145*a(n-12) -1029*a(n-13) -1042*a(n-14) +184*a(n-15) +1132*a(n-16) -216*a(n-17) -2049*a(n-18) -141*a(n-19) +321*a(n-20) +457*a(n-21) -4*a(n-22) +44*a(n-24) -352*a(n-25) +279*a(n-26) for n>30
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0....0..0..0..0..0..1....0..1..0..0..0..0....0..1..1..0..0..0
..0..0..0..1..0..0....0..0..0..0..0..0....0..1..0..0..1..0....0..0..0..0..0..0
..1..0..0..1..0..0....0..1..1..0..0..0....0..0..0..0..1..1....0..0..0..0..0..1
..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..0....0..0..1..0..0..1
..0..0..0..0..0..0....0..0..0..0..0..1....0..1..0..0..0..0....0..0..1..0..0..0
..1..0..0..1..0..1....0..1..1..0..0..0....0..1..0..0..1..0....0..0..0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 12 2015
STATUS
approved