OFFSET
1,1
COMMENTS
Column 6 of A260015
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +20*a(n-3) +125*a(n-4) -59*a(n-5) +18*a(n-6) -729*a(n-7) -3826*a(n-8) +489*a(n-9) +532*a(n-10) +7403*a(n-11) +38557*a(n-12) -313*a(n-13) -3705*a(n-14) -29029*a(n-15) -166609*a(n-16) -5164*a(n-17) +1596*a(n-18) +44987*a(n-19) +326610*a(n-20) +1811*a(n-21) +7895*a(n-22) -34542*a(n-23) -295044*a(n-24) +7102*a(n-25) -5217*a(n-26) +14136*a(n-27) +117306*a(n-28) -4662*a(n-29) +351*a(n-30) -2889*a(n-31) -18387*a(n-32) +729*a(n-33) +243*a(n-35) +729*a(n-36) for n>37
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..0..0..1....0..0..0..1..0..0..0..1....0..0..0..1..0..1..0..1
..1..0..1..0..1..0..1..0....1..0..1..0..1..0..0..0....1..0..1..0..0..0..1..0
..0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1
..1..0..1..0..1..0..1..0....0..0..1..0..1..0..1..0....0..0..1..0..1..0..1..0
..0..0..0..1..0..1..0..1....0..1..0..0..0..1..0..0....0..0..0..1..0..0..0..1
..1..0..1..0..0..0..0..0....0..0..1..0..1..0..0..0....0..0..1..0..1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 13 2015
STATUS
approved