OFFSET
1,1
COMMENTS
Column 3 of A258545
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +9*a(n-2) -51*a(n-3) -20*a(n-4) +275*a(n-5) -65*a(n-6) -820*a(n-7) +465*a(n-8) +1485*a(n-9) -1180*a(n-10) -1685*a(n-11) +1685*a(n-12) +1180*a(n-13) -1485*a(n-14) -465*a(n-15) +820*a(n-16) +65*a(n-17) -275*a(n-18) +20*a(n-19) +51*a(n-20) -9*a(n-21) -4*a(n-22) +a(n-23) for n>26
EXAMPLE
Some solutions for n=4
..1..1..1..0..0....0..0..0..0..0....1..0..1..0..0....0..1..1..0..1
..1..1..0..1..0....1..1..1..1..1....1..0..1..0..1....1..1..0..0..0
..0..1..0..1..0....0..0..0..0..0....1..1..1..1..1....0..1..1..1..1
..1..0..1..0..1....1..1..1..1..1....0..1..0..1..0....1..1..0..0..1
..0..0..1..0..1....0..0..0..0..0....0..0..0..0..1....0..1..1..1..1
..0..0..0..0..0....0..0..0..0..0....0..1..1..1..1....1..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 02 2015
STATUS
approved