OFFSET
1,1
COMMENTS
Table starts
....2...2.....4......6........8.........14..........20..........30..........48
....5...6....15.....25.......40.........89.........121.........237.........390
...11...6....37.....74......186........646........1278........3418........9113
...25..12...116....330.....1462.......5757.......22343.......79043......304799
...57..16...304...1145.....6718......49918......283985.....1666242.....9581018
..129..28...869...4499....41336.....490486.....5098814....41458261...447396605
..293..38..2398..15827...217785....3893262....70316883...978925384.16677156613
..665..66..6813..58043..1215485...37039909..1194164944.30759996872
.1509..92.18782.209838..6526016..307030328.16586413847
.3425.154.53067.757771.35833494.2801405991
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..126
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +2*a(n-2) +2*a(n-3)
k=2: a(n) = 2*a(n-2) +a(n-3) -a(n-5)
Empirical for row n:
n=1: a(n) = a(n-2) +2*a(n-3)
n=2: [order 14] for n>20
EXAMPLE
Some solutions for n=4 k=4
..3..2..3..2....3..2..3..2....3..2..3..3....3..2..3..2....3..2..2..2
..1..2..1..1....3..1..3..1....1..2..1..1....1..2..1..1....3..0..0..1
..2..0..0..1....1..2..2..3....3..2..2..2....3..2..0..2....1..0..2..1
..1..0..3..3....2..0..0..1....1..2..0..2....2..0..0..3....1..0..0..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 18 2014
STATUS
approved