OFFSET
1,1
COMMENTS
Column 7 of A252836
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 1306624*n^2 - 17846996*n + 62638467 for n>11
EXAMPLE
Some solutions for n=4
..0..1..2..2..3..4..4....0..1..2..2..3..4..5....0..1..1..2..3..3..4
..0..1..2..3..3..4..5....0..1..2..2..3..4..5....0..1..1..2..3..4..4
..1..1..2..3..3..4..5....1..1..2..2..3..4..5....1..1..2..2..3..4..5
..2..2..2..3..3..4..5....1..1..2..3..3..4..5....2..2..2..2..3..4..5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2014
STATUS
approved