OFFSET
1,1
COMMENTS
Table starts
..2....4.......7........11...........16............22.............29
..4...15......48.......125..........284...........582...........1097
..7...48.....316......1543.........6271.........22116..........69596
.11..125....1543.....14456.......110327........716770........4106515
.16..284....6271....110327......1607848......19629542......208224462
.22..582...22116....716770.....19629542.....455506837.....9073358239
.29.1097...69596...4106515....208224462....9073358239...342013040533
.37.1932..199504..21225132...1979743527..160455447637.11361329151015
.46.3219..528924.100450928..17168302936.2579449716281
.56.5123.1310622.439636230.137234695613
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..111
FORMULA
Empirical for column k:
k=1: a(n) = (1/2)*n^2 + (1/2)*n + 1
k=2: [polynomial of degree 5] for n>2
k=3: [polynomial of degree 13] for n>12
k=4: [polynomial of degree 30] for n>35
k=5: [polynomial of degree 69] for n>88
EXAMPLE
Some solutions for n=4 k=4
..0..0..3..3....0..0..0..0....0..0..0..0....3..0..0..3....0..3..3..3
..0..0..3..3....0..3..0..3....0..0..3..3....0..3..3..2....0..0..3..2
..3..3..2..1....0..0..3..2....0..3..2..2....3..0..2..2....3..3..3..0
..3..2..1..2....0..0..0..0....0..3..2..0....3..3..2..0....3..2..2..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 04 2014
STATUS
approved