OFFSET
1,1
COMMENTS
Column 3 of A250994
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 25*a(n-1) -263*a(n-2) +1465*a(n-3) -4208*a(n-4) +2752*a(n-5) +20591*a(n-6) -63149*a(n-7) +39306*a(n-8) +127182*a(n-9) -234935*a(n-10) -16967*a(n-11) +341508*a(n-12) -162216*a(n-13) -227787*a(n-14) +169273*a(n-15) +82343*a(n-16) -69183*a(n-17) -19686*a(n-18) +10818*a(n-19) +3132*a(n-20)
EXAMPLE
Some solutions for n=4
..0..0..1..0....0..1..0..1....0..0..0..1....1..1..0..0....1..0..1..0
..0..0..1..0....0..1..0..2....0..0..1..0....1..1..1..2....0..1..0..2
..0..0..0..2....0..0..1..0....0..0..2..1....1..1..2..1....0..1..0..2
..0..0..1..0....0..1..0..2....1..1..1..2....1..1..1..2....0..1..0..0
..0..1..0..2....0..1..0..0....1..1..2..1....1..1..1..2....0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved