OFFSET
1,1
COMMENTS
Table starts
..2....4......7.......11........16.........22.........29..........37.........46
..4...15.....48......136.......341........771.......1606........3133.......5789
..7...48....239.....1084......4444......16366......54500......166271.....470106
.11..136...1084.....8427.....60039.....384591....2209056....11456481...54141062
.16..341...4444....60039....754758....8638999...89104481...828893716.6983821643
.22..771..16366...384591...8638999..180409504.3428152304.58981679762
.29.1606..54500..2209056..89104481.3428152304
.37.3133.166271.11456481.828893716
.46.5789.470106.54141062
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..84
FORMULA
Empirical for column k:
k=1: a(n) = (1/2)*n^2 + (1/2)*n + 1
k=2: [polynomial of degree 7] for n>3
k=3: [polynomial of degree 15] for n>5
k=4: [polynomial of degree 31] for n>13
EXAMPLE
Some solutions for n=4 k=4
..0..0..0..0....0..1..0..0....0..1..0..0....0..0..0..1....0..0..0..1
..0..1..0..0....0..1..0..0....1..0..1..0....0..1..1..0....0..0..1..0
..1..0..1..0....0..0..0..0....1..1..1..0....1..1..1..0....0..0..0..0
..1..0..0..1....0..0..0..1....0..1..1..0....0..1..0..0....0..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jul 01 2013
STATUS
approved