OFFSET
1,1
COMMENTS
Row 4 of A207123
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) -12*a(n-2) +30*a(n-3) -105*a(n-4) +140*a(n-5) -191*a(n-6) +637*a(n-7) -525*a(n-8) +374*a(n-9) -2132*a(n-10) +851*a(n-11) -82*a(n-12) +4997*a(n-13) -364*a(n-14) -761*a(n-15) -7828*a(n-16) -1358*a(n-17) +1552*a(n-18) +7812*a(n-19) +2336*a(n-20) -1168*a(n-21) -4944*a(n-22) -1472*a(n-23) +512*a(n-24) +1632*a(n-25) +448*a(n-26) -128*a(n-27) -256*a(n-28)
EXAMPLE
Some solutions for n=4
..0..0..0..0....1..1..1..1....0..0..0..0....1..0..0..0....0..1..1..0
..0..1..1..0....1..1..1..1....0..1..1..1....1..0..0..0....1..0..1..1
..0..0..0..0....1..1..1..1....0..0..0..0....1..0..0..0....0..0..0..0
..0..0..0..0....1..1..1..0....0..1..1..1....0..0..0..0....1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 15 2012
STATUS
approved