OFFSET
1,1
COMMENTS
Column 1 of A254989
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) -17*a(n-2) +26*a(n-3) -12*a(n-4) -92*a(n-5) +89*a(n-6) -116*a(n-7) -121*a(n-8) +727*a(n-9) +341*a(n-10) +262*a(n-11) +1668*a(n-12) -1380*a(n-13) -791*a(n-14) -5504*a(n-15) -1622*a(n-16) -1160*a(n-17) -1450*a(n-18) +18620*a(n-19) -316*a(n-20) +1254*a(n-21) -27288*a(n-22) +3524*a(n-23) +42952*a(n-24) -9576*a(n-25) -34248*a(n-26) +8272*a(n-27) +11264*a(n-28) -15296*a(n-29) +7200*a(n-30) +3168*a(n-31) -384*a(n-33) for n>38
EXAMPLE
Some solutions for n=4
..0..0..1....0..0..1....0..1..1....0..1..1....1..1..0....0..1..0....1..0..0
..0..0..1....1..1..1....0..0..0....1..0..1....0..0..1....0..0..0....0..0..1
..0..0..1....0..1..1....0..0..0....1..1..1....1..0..0....1..1..0....0..0..1
..0..1..1....1..1..1....0..0..0....0..1..1....0..0..1....0..1..1....1..0..1
..1..0..0....1..0..1....1..1..1....1..1..0....1..0..0....1..1..0....1..1..1
..1..0..1....1..0..0....1..1..0....1..1..1....1..1..1....0..0..1....0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2015
STATUS
approved