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A202686
T(n,k)=Number of nXk 0..3 arrays with row sums equal and column sums equal
7
4, 4, 4, 4, 16, 4, 4, 16, 16, 4, 4, 96, 340, 96, 4, 4, 104, 832, 832, 104, 4, 4, 904, 6784, 89520, 6784, 904, 4, 4, 788, 224764, 389704, 389704, 224764, 788, 4, 4, 10448, 496276, 39506424, 290838284, 39506424, 496276, 10448, 4, 4, 6280, 4373632, 235092820
OFFSET
1,1
COMMENTS
Table starts
.4......4.........4............4..............4..............4..............4
.4.....16........16...........96............104............904............788
.4.....16.......340..........832...........6784.........224764.........496276
.4.....96.......832........89520.........389704.......39506424......235092820
.4....104......6784.......389704......290838284.....1901127404...143872363604
.4....904....224764.....39506424.....1901127404.12092687195284.98588916749684
.4....788....496276....235092820...143872363604.98588916749684
.4..10448...4373632..84143001856.11292985987784
.4...6280.231072928.158178730792
.4.134716.353406676
LINKS
EXAMPLE
Some solutions for n=4 k=3
..2..2..2....0..1..2....3..0..3....2..1..0....2..2..2....0..3..0....1..2..0
..3..3..0....1..1..1....1..3..2....1..0..2....2..3..1....1..1..1....1..1..1
..3..0..3....2..1..0....3..2..1....0..1..2....3..1..2....1..0..2....1..0..2
..0..3..3....1..1..1....1..3..2....1..2..0....1..2..3....2..0..1....1..1..1
CROSSREFS
Sequence in context: A369719 A369757 A365489 * A134660 A132383 A115639
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 22 2011
STATUS
approved