OFFSET
1,1
COMMENTS
Column 3 of A295943.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
Robert Israel, Maple-assisted proof of formula
FORMULA
Empirical: a(n) = a(n-1) + 3*a(n-2) + 18*a(n-3) + a(n-4) - 19*a(n-5) - 36*a(n-6) - 13*a(n-7) + 5*a(n-8) + 10*a(n-9).
Empirical formula confirmed by Robert Israel, Nov 30 2017 (see link).
EXAMPLE
Some solutions for n=7:
1 1 0 1 1 0 0 0 1 1 0 1 1 1 0 0 1 0 0 0 0
0 0 0 0 0 0 0 1 0 0 1 0 1 1 0 1 0 0 1 0 0
0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1
0 1 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0
0 0 0 0 0 1 0 0 1 1 0 1 0 1 0 0 0 1 0 0 0
0 1 0 1 1 0 0 0 0 1 0 1 1 0 1 0 0 1 1 1 0
0 0 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 30 2017
STATUS
approved