OFFSET
1,1
COMMENTS
Column 1 of A254998
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -23*a(n-2) +44*a(n-3) -66*a(n-4) -8*a(n-5) +140*a(n-6) -330*a(n-7) +1242*a(n-8) -2238*a(n-9) +3095*a(n-10) -3686*a(n-11) +800*a(n-12) +3024*a(n-13) -10566*a(n-14) +29630*a(n-15) -49344*a(n-16) +46186*a(n-17) -50188*a(n-18) +48446*a(n-19) +15531*a(n-20) -117740*a(n-21) +178416*a(n-22) -218922*a(n-23) +361814*a(n-24) -321718*a(n-25) +46758*a(n-26) +27060*a(n-27) -20770*a(n-28) +400582*a(n-29) -819637*a(n-30) +440604*a(n-31) +150305*a(n-32) +416494*a(n-33) -832954*a(n-34) -170232*a(n-35) +836549*a(n-36) +137570*a(n-37) -854341*a(n-38) -351998*a(n-39) +1162124*a(n-40) +31976*a(n-41) -958036*a(n-42) +16048*a(n-43) +573824*a(n-44) -177168*a(n-45) -427248*a(n-46) +99264*a(n-47) +163584*a(n-48) -13824*a(n-49) -20736*a(n-50) for n>54
EXAMPLE
Some solutions for n=4
..0..0..1....1..0..1....0..0..0....0..1..0....1..1..0....0..0..0....0..1..1
..0..0..1....1..0..1....0..0..0....0..0..0....0..1..1....1..1..1....0..1..1
..0..1..1....1..1..0....1..1..0....1..0..0....1..1..1....1..1..0....1..0..1
..1..1..1....0..0..1....1..0..0....0..1..0....0..1..1....0..0..1....1..0..0
..1..0..1....0..0..1....0..1..1....0..1..0....0..0..1....0..1..1....1..0..0
..1..0..1....1..1..0....1..1..0....0..1..1....0..0..1....1..1..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2015
STATUS
approved