OFFSET
1,1
COMMENTS
Column 2 of A253841
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) -a(n-2) +6*a(n-4) -12*a(n-5) +8*a(n-6) -4*a(n-7) -7*a(n-8) +18*a(n-9) -21*a(n-10) +24*a(n-11) -9*a(n-12) -6*a(n-13) +21*a(n-14) -36*a(n-15) +24*a(n-16) -12*a(n-17) -2*a(n-18) +16*a(n-19) -17*a(n-20) +18*a(n-21) -9*a(n-22) +4*a(n-24) -8*a(n-25) +4*a(n-26) for n>30
EXAMPLE
Some solutions for n=4
..0..1..0..0....0..0..1..1....1..0..0..0....0..0..1..1....1..0..0..0
..0..1..1..0....0..0..0..1....1..0..1..1....1..1..0..1....0..0..1..1
..0..1..1..0....0..0..0..0....0..0..1..0....0..1..0..1....0..0..1..1
..0..1..1..1....1..0..1..1....1..1..1..0....1..1..0..1....1..1..1..1
..1..1..1..1....1..0..1..0....0..1..1..1....1..1..1..1....1..1..1..1
..1..0..1..1....1..1..1..1....0..1..1..1....1..1..1..1....0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2015
STATUS
approved