OFFSET
1,1
COMMENTS
Table starts
.......4.........16.............60...............216..................756
......16........180...........1284..............9612................68052
......64.......1740..........25572............400428..............5877228
.....256......15540.........471492..........15289548............463790340
....1024.....132300........8314020.........555862380..........34838403756
....4096....1090740......142233732.......19558138380........2532677348772
...16384....8787660.....2380537188......672230393004......179867149105740
...65536...69580980....39186271044....22702294138188....12551707872624132
..262144..543538380...636703584804...756261535626732...864008559706781292
.1048576.4200069300.10237337586180.24917784636315276.58827234014669683044
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..161
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1)
k=2: a(n) = 14*a(n-1) -49*a(n-2) for n>3
k=3: a(n) = 30*a(n-1) -237*a(n-2) +180*a(n-3) -36*a(n-4) for n>5
k=4: [order 6] for n>7
k=5: [order 20] for n>21
k=6: [order 42] for n>43
Empirical for row n:
n=1: a(n) = 6*a(n-1) -9*a(n-2)
n=2: a(n) = 10*a(n-1) -13*a(n-2) -60*a(n-3) -36*a(n-4)
n=3: [order 8]
n=4: [order 20]
n=5: [order 52] for n>53
EXAMPLE
Some solutions for n=3 k=4
..2..2..0..0. .2..2..1..1. .2..0..0..1. .0..0..2..2. .2..2..2..2
..1..0..0..2. .2..0..0..0. .0..2..0..2. .2..2..2..2. .0..0..0..1
..2..0..2..0. .1..0..0..0. .1..0..2..0. .1..0..0..2. .1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved