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A190071
T(n,k)=Number of arrangements of n+1 nonzero numbers x(i) in -k..k with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero
16
0, 2, 4, 6, 12, 0, 12, 36, 40, 12, 20, 76, 166, 144, 0, 30, 143, 483, 922, 550, 40, 42, 233, 1126, 3481, 5136, 1896, 0, 56, 366, 2276, 9904, 25306, 28656, 7584, 140, 72, 536, 4150, 23400, 88509, 191456, 162028, 27328, 0, 90, 760, 6946, 48491, 249119, 834717
OFFSET
1,2
COMMENTS
Table starts
...0......2........6........12.........20..........30...........42...........56
...4.....12.......36........76........143.........233..........366..........536
...0.....40......166.......483.......1126........2276.........4150.........6946
..12....144......922......3481.......9904.......23400........48491........92478
...0....550.....5136.....25306......88509......249119.......599181......1291797
..40...1896....28656....191456.....834717.....2783714......7737762.....18951546
...0...7584...162028...1436962....7843113....31391655....101530262....282859251
.140..27328...910716..10802667...73725405...353856100...1333341624...4232955454
...0.105348..5162308..81709584..697624797..4017545773..17643516841..63898862902
.504.398760.29554964.622881909.6644826507.45918810745.235162515839.972408511316
LINKS
EXAMPLE
Some solutions for n=6 k=4
.-3...-4....2....1....3...-3...-4....1....2...-1...-3....2...-1....1....2...-2
.-1...-4...-4...-3...-2...-2...-2...-2...-3...-1...-1...-1...-2...-2...-3...-4
..3....2....1....2....4....1....4...-2...-2...-3....1....3...-3....3...-2...-2
.-1....2....1....4....2...-2...-3....2....4....1....2....3...-2....1...-3....1
.-1....4...-2....3...-1....3....3...-4...-1....2....3...-4....2...-2....2....3
..4....3...-1....4...-3....2....3...-4...-4....2...-4...-4...-1....3....4....2
..3...-2...-1....3...-3...-3....4....4...-3....4....3...-4....1...-3...-3...-1
CROSSREFS
Column 1 is A028329(n/2) for even n
Row 1 is A002378(n-1)
Sequence in context: A084979 A049914 A056763 * A189498 A129567 A064469
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin May 04 2011
STATUS
approved