login
A180823
T(n,k)=number of distinct solutions of sum{i=1..k}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2
10
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 2, 2, 0, 0, 0, 1, 0, 6, 0, 0, 0, 0, 1, 3, 15, 8, 3, 0, 0, 0, 1, 7, 30, 32, 27, 3, 0, 0, 0, 1, 4, 57, 102, 111, 30, 4, 0, 0, 0, 1, 9, 102, 286, 485, 210, 59, 0, 0, 0, 0, 1, 5, 168, 715, 1701, 1209, 497, 64, 9, 0, 0, 0, 1, 11, 267, 1636, 5509
OFFSET
1,20
COMMENTS
Table starts
.0..0...0....0.....0......0......0.......0.......0........0.........0.........0
.0..0...0....0.....0......0......0.......0.......0........0.........0.........0
.0..0...0....0.....0......0......0.......0.......0........0.........0.........0
.1..1...1....1.....1......1......1.......1.......1........1.........1.........1
.0..2...0....3.....7......4......9.......5......11.......18........13........21
.2..6..15...30....57....102....168.....267.....409......602.......864......1212
.0..8..32..102...286....715...1636....3470....6946....13198.....23994.....41990
.3.27.111..485..1701...5509..16029...43311..108997...258821....583009...1254699
.3.30.210.1209..5969..25718..98932..345834.1113650..3339823...9410517..25092113
.4.59.497.3622.22212.118806.566139.2444098.9684748.35591489.122345015.396165307
LINKS
CROSSREFS
Sequence in context: A292946 A196078 A287086 * A049800 A281082 A204421
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved