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A201496 T(n,k)=Number of nXk zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing 8
1, 3, 3, 5, 29, 5, 8, 226, 226, 8, 12, 1454, 9331, 1454, 12, 18, 7815, 301432, 301432, 7815, 18, 24, 36487, 7798656, 50432052, 7798656, 36487, 24, 33, 151593, 168357815, 6697376240, 6697376240, 168357815, 151593, 33, 43, 571539, 3127432827 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
..1.......3............5................8..................12
..3......29..........226.............1454................7815
..5.....226.........9331...........301432.............7798656
..8....1454.......301432.........50432052..........6697376240
.12....7815......7798656.......6697376240.......4585552158911
.18...36487....168357815.....732383803600....2571822263246639
.24..151593...3127432827...68110029402413.1219998885223727883
.33..571539..51118964623.5516712973977104
.43.1982705.747555368709
.55.6399842
LINKS
EXAMPLE
Some solutions for n=3 k=3
.-2..1..2...-1..1..1...-2.-1..0...-2.-1..0...-2.-2.-1...-2.-2..1....0..0..1
..0..0..1....1.-2.-1....0.-1..2...-1..2.-1...-2..2..2...-1..0..0....0..1.-1
..2.-2.-2....2..1.-2....2..2.-2....1..1..1....0..1..2....1..1..2....2.-1.-2
CROSSREFS
Column 1 is A001973
Sequence in context: A196430 A366594 A265878 * A110426 A200562 A093310
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 02 2011
STATUS
approved

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Last modified July 14 13:29 EDT 2024. Contains 374318 sequences. (Running on oeis4.)