OFFSET
1,1
COMMENTS
Table starts
..3....7.....12.......18.........25...........33............42............52
..7...26.....72......171........368..........729..........1343..........2325
.12...72....335.....1366.......4948........16115.........47659........129463
.18..171...1366....10050......65317.......375270.......1924848.......8908719
.25..368...4948....65317.....786154......8379285......79224749.....668706345
.33..729..16115...375270....8379285....168973605....3034194621...48518491730
.42.1343..47659..1924848...79224749...3034194621..104606988712.3220901001021
.52.2325.129463..8908719..668706345..48518491730.3220901001021
.63.3819.326522.37616613.5081503151.694140800875
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical for column k:
k=1: a(n) = (1/2)*n^2 + (5/2)*n
k=2: [polynomial of degree 5] for n>2
k=3: [polynomial of degree 11] for n>6
EXAMPLE
Some solutions for n=4 k=4
..0..0..0..2....0..0..1..1....1..0..0..0....0..0..1..1....0..0..1..0
..0..0..1..1....1..0..1..1....0..0..0..0....0..2..1..1....0..1..0..0
..1..0..1..1....1..0..1..1....1..1..0..1....0..2..2..1....2..0..0..1
..0..0..1..0....2..2..2..1....2..1..0..1....1..2..1..0....2..0..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jun 27 2013
STATUS
approved