OFFSET
1,4
COMMENTS
Table starts
.0.....1.....2...........4..............8.................16
.0.....4.....8..........81............392...............2500
.0....16....30........2116..........22268.............488601
.0....64...112.......58081........1319409..........103489929
.0...256...418.....1612900.......78633756........22466712321
.0..1024..1560....44903401.....4684821704......4919350997521
.0..4096..5822..1250753956...278802326676...1080371161000000
.0.16384.21728.34842328921.16577412686597.237502965724417600
Even columns are perfect squares
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..126
EXAMPLE
Some solutions for n=3 k=4
..1..2..1..0....0..2..2..0....0..2..2..1....0..2..2..1....1..1..0..1
..0..2..1..2....0..2..1..0....0..1..1..1....1..0..1..1....1..1..1..1
..2..0..1..0....2..1..1..1....2..1..1..0....1..1..1..1....1..1..2..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jan 06 2013
STATUS
approved