OFFSET
1,3
COMMENTS
Column 2 of A211904
FORMULA
Empirical: a(n) = (1/128)*n^8 + (1/32)*n^7 - (41/192)*n^6 - (3/8)*n^5 + (329/128)*n^4 - (139/96)*n^3 - (467/96)*n^2 + (127/24)*n 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......1.2......1.2......1.2......1.2
...3.4.5....3.4.5....3.4.5....3.4.5....3.0.4....3.4.5....3.4.0....3.0.1
..4.6.0.7..6.7.6.3..6.7.0.7..4.0.6.7..5.6.7.0..6.7.1.8..5.6.2.7..4.5.6.7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 25 2012
STATUS
approved