OFFSET
1,5
COMMENTS
Table starts
.1...1......1.........1.............1................1....................1
.1...2......4.........8............16...............32...................64
.1...4.....18........86...........422.............2094................10438
.1...8.....86......1082.........14554...........200818..............2796826
.1..16....422.....14554........560778.........22501266............915745002
.1..32...2094....200818......22501266.......2666449962.........322124540754
.1..64..10438...2796826.....915745002.....322124540754......116124404018058
.1.128..52126..39082562...37450557314...39169337042938....42209510913723266
.1.256.260502.546791114.1534144563898.4773343640706306.15385058360607977882
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..760
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 2*a(n-1)
k=3: a(n) = 7*a(n-1) -10*a(n-2)
k=4: a(n) = 21*a(n-1) -108*a(n-2) +140*a(n-3)
k=5: a(n) = 62*a(n-1) -969*a(n-2) +4568*a(n-3) -5740*a(n-4)
k=6: a(n) = 184*a(n-1) -8533*a(n-2) +122786*a(n-3) -563036*a(n-4) +700280*a(n-5)
k=7: a(n) = 549*a(n-1) -75693*a(n-2) +3237331*a(n-3) -45379926*a(n-4) +206208420*a(n-5) -255602200*a(n-6)
EXAMPLE
Some solutions for n=4 k=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..0..0....0..1..1..0....0..0..1..1....0..1..0..0....0..1..1..1
..0..1..0..0....0..1..1..0....0..1..1..2....0..0..0..0....0..1..1..2
..0..1..0..1....0..0..0..0....0..1..1..2....0..0..0..1....0..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved