OFFSET
1,1
COMMENTS
Table starts
....3.......7.........16..........38............90...........212...........500
....7......26........102.........429..........1814..........7576.........31876
...16......89........707........5610.........45436........368247.......2999288
...38.....342.......5484.......85567.......1378558......22319938.....362690826
...90....1362......43200.....1350983......43503375....1409359406...45804774819
..212....5447.....343959....21525611....1386865953...89883497849.5842759733285
..500...21816....2750576...344032061...44332944831.5748121725943
.1180...87527...22038291..5504564819.1418479860917
.2784..351510..176729972.88114108260
.6568.1412417.1417804827
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..81
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +2*a(n-3)
k=2: [order 31]
Empirical for row n:
n=1: a(n) = 2*a(n-1) +2*a(n-3)
n=2: [order 44]
EXAMPLE
Some solutions for n=4 k=4
..2..0..0..0....0..2..2..0....0..2..2..2....0..2..0..2....2..2..2..2
..0..0..0..0....0..0..2..2....2..0..2..0....0..0..2..0....0..0..0..2
..0..0..0..0....2..2..2..2....2..2..0..0....2..0..2..2....2..0..2..2
..2..0..0..0....0..2..2..0....0..2..2..2....0..0..0..0....0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 03 2014
STATUS
approved