OFFSET
1,1
COMMENTS
Row 7 of A255622
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/40320)*n^8 + (23/10080)*n^7 + (239/2880)*n^6 + (1541/144)*n^5 + (920887/5760)*n^4 + (442121/1440)*n^3 + (42883817/3360)*n^2 - (2307073/56)*n + 29319 for n>5
EXAMPLE
Some solutions for n=4
..1....2....0....2....1....1....2....2....2....1....0....2....0....0....0....1
..1....0....1....0....0....0....0....0....0....0....0....0....2....1....0....1
..1....0....2....0....1....0....0....1....0....1....1....0....0....0....0....1
..2....0....1....2....2....2....1....1....0....2....2....1....2....2....1....1
..0....1....1....2....1....2....2....1....0....1....1....2....0....1....1....1
..2....2....2....0....2....0....0....1....0....0....0....0....2....2....0....1
..1....1....0....0....0....2....0....2....2....2....2....0....0....2....2....2
..2....1....2....1....0....0....2....0....0....2....2....0....0....2....2....0
..2....0....1....1....0....1....0....1....2....2....0....0....1....2....2....2
..2....2....2....2....0....1....0....1....2....2....1....0....2....0....2....2
..1....0....1....0....0....0....1....1....0....0....0....1....2....2....1....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2015
STATUS
approved