OFFSET
1,5
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..84
EXAMPLE
Table starts:
..1.....1........1...........1............1.............2.............2
..1.....2........2...........5...........12............42...........136
..1.....2........4..........29...........97..........1534..........7050
..1.....5.......29.........371.........6150........167130.......5219070
..1....12.......97........6150.......146327......30312074....1355988481
..2....42.....1534......167130.....30312074...10311562327.4761748786964
..2...136.....7050.....5219070...1355988481.4761748786964
..5...602...188835...233834847.609400419815
..5..2440..1084180.11412814314
.15.12840.42756208
.15.61912
.52
Some solutions for n=4 and k=4:
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1
..2..x..1..x....2..x..3..x....0..x..2..x....0..x..1..x....0..x..1..x
..x..1..x..2....x..1..x..4....x..3..x..0....x..2..x..0....x..1..x..0
..0..x..2..x....3..x..2..x....4..x..0..x....3..x..4..x....1..x..2..x
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Aug 30 2012
STATUS
approved