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

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

R. H. Hardin, Table of n, a(n) for n=1..2016

Crossrefs

Sequence in context: A292946 A196078 A287086 * A049800 A281082 A204421

Adjacent sequences: A180820 A180821 A180822 * A180824 A180825 A180826

Keyword

nonn,tabl

Author

R. H. Hardin Sep 20 2010

Status

approved