OFFSET
1,1
COMMENTS
Column 4 of A296019.
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) + 6*a(n-2) + 36*a(n-3) + 8*a(n-4) - 71*a(n-5) - 345*a(n-6) - 221*a(n-7) + 167*a(n-8) + 1167*a(n-9) + 930*a(n-10) + 200*a(n-11) - 1607*a(n-12) - 1327*a(n-13) - 670*a(n-14) + 1036*a(n-15) + 741*a(n-16) + 514*a(n-17) - 306*a(n-18) - 128*a(n-19) - 114*a(n-20) + 40*a(n-21).
Empirical formula confirmed by Robert Israel, Dec 03 2017 (see link).
EXAMPLE
Some solutions for n=5:
0 0 1 1 0 0 0 0 1 0 1 1 1 0 0 1 0 0 1 0
0 0 0 0 1 0 1 1 1 0 0 0 0 1 1 0 0 0 0 1
0 1 0 1 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0
1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0
0 0 0 0 0 1 1 0 0 0 0 1 1 0 1 0 0 0 0 1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2017
STATUS
approved