OFFSET
1,1
COMMENTS
Table starts
..2....4......7.......11.........16...........22............29............37
..4...13.....37.......91........199..........397...........736..........1285
..7...37....187......792.......2866.........9136.........26267.........69311
.11...91....792.....6195......41222.......235528.......1179663.......5279390
.16..199...2866....41222.....523701......5692900......53537470.....442630782
.22..397...9136...235528....5692900....119835087....2182420206...34737998303
.29..736..26267..1179663...53537470...2182420206...77611438870.2412616653873
.37.1285..69311..5279390..442630782..34737998303.2412616653873
.46.2134.170084.21450391.3265819433.489248332852
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical: column k is a polynomial in n of degree 3*2^(k-1)-1 for k in 1..5 and n>0,0,1,5,13
EXAMPLE
Some solutions for n=4 k=4
..0..0.-1..0....0..0..0..0....0..0.-1..1....0..0.-1..0....0.-1..1..0
..0.-1.-1..0....0..0..0..0....0.-1..0..0....0.-1.-1..0....0..0..0..0
.-1..0..0..0...-1..1..0..0....0..0..0.-1...-1.-1..1..0....0..0..0..0
..0..0..1..0....0..0..0..0....0..0..0..1....0..0..0..0...-1..1.-1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jun 20 2013
STATUS
approved