OFFSET
1,1
COMMENTS
Row 5 of A228740
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (n+1)*(19*n^4+186*n^3+349*n^2+226*n+60)/60.
Empirical: G.f. -x*(-28-17*x-6*x^2+18*x^3-6*x^4+x^5) / (x-1)^6. - R. J. Mathar, Sep 02 2013
EXAMPLE
Some solutions for n=4
..2..2..4..2..2..1..3..2..1..3..0..3..2..0..0..3
..2..2..4..0..2..0..2..1..4..3..2..1..4..1..4..3
..4..2..4..4..1..0..2..0..1..3..0..2..0..4..1..0
..1..4..1..0..4..0..0..1..4..1..0..2..0..1..4..2
..2..1..2..4..1..0..1..3..4..2..0..3..0..4..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 01 2013
STATUS
approved