OFFSET
1,1
COMMENTS
Row 3 of A220153
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/362880)*n^9 + (1/40320)*n^8 - (11/60480)*n^7 - (49/2880)*n^6 + (10837/17280)*n^5 - (30473/5760)*n^4 + (1003267/45360)*n^3 + (41353/3360)*n^2 - (594077/2520)*n + 361 for n>6
EXAMPLE
Some solutions for n=3
..2..0..0....1..0..1....1..1..1....0..0..1....1..0..0....1..0..0....0..0..0
..2..0..0....1..0..0....1..1..1....0..0..0....2..2..1....2..1..1....2..1..0
..2..0..0....2..2..1....2..1..1....1..1..0....2..2..2....2..2..2....2..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2012
STATUS
approved