|
| |
|
|
A184101
|
|
T(n,k)=One quarter the number of nXk toroidal 0..3 arrays with each element having the sum of its vertical neighbors equal to the sum of its horizontal neighbors
|
|
2
|
|
|
|
1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 4, 85, 4, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 484, 1, 4, 1, 1, 1, 85, 1, 1, 85, 1, 1, 1, 4, 1, 4, 3661, 4, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 85, 484, 1, 28900, 1, 484, 85, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 4, 1, 4, 137845, 4, 1, 4, 1, 4, 1, 1, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,5
|
|
|
COMMENTS
|
One quarter the number of solutions in 0..3 of a 1-d velocity-one wave equation utt=uxx on a periodic grid
Table starts
.1.1..1...1....1.....1......1.......1..1....1.1.....1.1.1..1.1.1
.1.4..1...4....1.....4......1.......4..1....4.1.....4.1.4..1.4
.1.1.85...1....1....85......1.......1.85....1.1....85.1.1.85
.1.4..1.484....1.....4......1.....484..1....4.1...484.1.4
.1.1..1...1.3661.....1......1.......1..1.3661.1.....1.1
.1.4.85...4....1.28900......1.......4.85....4.1.28900
.1.1..1...1....1.....1.137845.......1..1....1.1
.1.4..1.484....1.....4......1.1322500..1....4
.1.1.85...1....1....85......1.......1
.1.4..1...4.3661.....4......1
|
|
|
LINKS
|
R. H. Hardin, Table of n, a(n) for n = 1..144
|
|
|
EXAMPLE
|
Some solutions for 9X3
..3..0..3....1..1..1....3..2..0....2..1..1....1..0..2....3..1..2....1..2..1
..3..3..0....0..1..2....1..1..3....2..2..0....2..1..0....0..3..3....1..2..1
..0..3..3....2..1..0....1..2..2....0..1..3....0..2..1....3..2..1....2..0..2
..3..0..3....1..1..1....3..2..0....2..1..1....1..0..2....3..1..2....1..2..1
..3..3..0....0..1..2....1..1..3....2..2..0....2..1..0....0..3..3....1..2..1
..0..3..3....2..1..0....1..2..2....0..1..3....0..2..1....3..2..1....2..0..2
..3..0..3....1..1..1....3..2..0....2..1..1....1..0..2....3..1..2....1..2..1
..3..3..0....0..1..2....1..1..3....2..2..0....2..1..0....0..3..3....1..2..1
..0..3..3....2..1..0....1..2..2....0..1..3....0..2..1....3..2..1....2..0..2
|
|
|
CROSSREFS
|
Sequence in context: A110916 A185058 A204160 * A164561 A178764 A070010
Adjacent sequences: A184098 A184099 A184100 * A184102 A184103 A184104
|
|
|
KEYWORD
|
nonn,tabl
|
|
|
AUTHOR
|
R. H. Hardin Jan 09 2011
|
|
|
STATUS
|
approved
|
| |
|
|
