OFFSET
1,1
COMMENTS
Row 3 of A232076
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) +51*a(n-2) +222*a(n-3) +815*a(n-4) +770*a(n-5) -1668*a(n-6) -4457*a(n-7) -7039*a(n-8) -6459*a(n-9) +2910*a(n-10) +4218*a(n-11) +4541*a(n-12) +9610*a(n-13) -285*a(n-14) -4890*a(n-15) -152*a(n-16) -224*a(n-17) +432*a(n-18) +512*a(n-19) -256*a(n-20)
EXAMPLE
Some solutions for n=4
..0..1..0..1..0....0..1..1..0..1....0..1..0..0..1....0..0..0..0..1
..1..0..1..0..0....1..0..0..1..1....0..0..1..1..0....0..1..1..1..1
..1..1..1..0..0....1..0..1..1..0....1..0..0..0..0....0..0..1..1..0
..1..0..0..0..0....0..1..1..0..0....0..1..1..0..0....0..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2013
STATUS
approved