OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..64
FORMULA
Empirical: a(n) = 4*a(n-1) +20*a(n-2) -29*a(n-3) -124*a(n-4) +55*a(n-5) +330*a(n-6) -57*a(n-7) -498*a(n-8) -291*a(n-9) +965*a(n-10) +676*a(n-11) -991*a(n-12) -659*a(n-13) +771*a(n-14) +610*a(n-15) -581*a(n-16) -78*a(n-17) -36*a(n-18) +32*a(n-19) -94*a(n-20) +32*a(n-21) +68*a(n-22) -16*a(n-23).
EXAMPLE
Some solutions for n=3:
..0..1..1..0....0..0..0..0....0..1..0..0....0..1..0..1....0..0..0..1
..0..0..0..0....0..0..0..1....0..0..1..0....0..0..0..0....1..0..0..0
..0..1..0..0....0..0..1..1....0..1..0..0....0..0..0..0....0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 09 2012
STATUS
approved