OFFSET
1,12
COMMENTS
Table starts
.1..1...1....1.....1.....1......1......1......1.......1.......1.......1......1
.1..1...1....2.....2.....2......2......3......3.......3.......3.......4......4
.1..1...3....3.....3.....7......7......7.....13......13......13......21.....21
.1..3...5...10....16....26.....38.....55.....75.....101.....131.....168....210
.1..5..13...31....71...137....243....399....619.....927....1329....1857...2525
.2.10..46..153...409...923...1854...3477...6034....9876...15590...23625..34577
.3.23.157..703..2313..6261..14701..31069..60429..109991..189627..312461.495497
.5.66.608.3393.13561.43228.116960.279721.607559.1221648.2305788.4128363
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..184
FORMULA
Empirical for row n:
n=2: a(k) = a(k-1) + a(k-4) - a(k-5).
n=3: a(k) = a(k-1) + 2*a(k-3) - 2*a(k-4) - a(k-6) + a(k-7).
n=4: a(k) = 3*a(k-1) - 2*a(k-2) - 2*a(k-3) + 3*a(k-4) - a(k-5).
EXAMPLE
Some solutions for n=6, k=6:
.-2...-2...-3...-1...-4...-2...-2...-2...-3...-2...-3...-2...-2...-2...-1...-3
.-2....2...-2...-1...-3...-2...-1....0...-3....0...-3...-1...-1...-1...-1...-3
..1....1....2....1....3...-1...-2....0....2...-2....3....1....2....1...-1....1
..2....0....3....0....3...-1....2...-1....2....0....4....2....2....1....1....0
..2....0....0....0....0....3....2....2....3....2....1...-1....0....0....0....3
.-1...-1....0....1....1....3....1....1...-1....2...-2....1...-1....1....2....2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 04 2012
STATUS
approved