OFFSET
1,2
COMMENTS
Column 2 of A211930
FORMULA
Empirical: a(n) = (1/128)*n^8 + (1/32)*n^7 - (41/192)*n^6 - (1/4)*n^5 + (345/128)*n^4 - (367/96)*n^3 - (143/96)*n^2 + (169/24)*n - 3 for n>1
EXAMPLE
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......1.2......1.0......1.2......1.2......1.2
..3.1.4....3.4.5....3.4.2....3.4.5....2.3.4....3.4.5....3.1.4....3.4.2
..5.6.1.7..6.2.7.6..5.0.6.7..2.6.7.8..5.6.0.7..6.2.7.4..5.6.7.2..5.3.6.7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 25 2012
STATUS
approved