OFFSET
1,1
COMMENTS
Row 4 of A207391
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) -8*a(n-2) +19*a(n-3) -54*a(n-4) +51*a(n-5) -64*a(n-6) +169*a(n-7) -78*a(n-8) +62*a(n-9) -265*a(n-10) +27*a(n-11) -41*a(n-12) +277*a(n-13) +16*a(n-14) +40*a(n-15) -162*a(n-16) -31*a(n-17) -10*a(n-18) +41*a(n-19) +13*a(n-20) -6*a(n-22)
EXAMPLE
Some solutions for n=4
..1..1..0..0....1..1..1..1....0..1..1..1....1..1..1..1....1..0..1..1
..1..0..0..0....1..1..1..1....0..0..0..0....1..0..0..0....0..1..1..1
..1..1..0..0....1..1..1..1....0..1..1..0....1..1..1..1....1..1..1..1
..1..0..0..0....1..1..1..1....0..0..0..0....1..0..0..0....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 17 2012
STATUS
approved