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A201989 T(n,k)=Number of nXk zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing 7
1, 4, 4, 8, 77, 8, 18, 1170, 1170, 18, 32, 14107, 134217, 14107, 32, 58, 139471, 11648559, 11648559, 139471, 58, 94, 1177568, 803133854, 7375608084, 803133854, 1177568, 94, 151, 8721417, 46034224561, 3674187761233, 3674187761233 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

...1........4..............8.................18...................32

...4.......77...........1170..............14107...............139471

...8.....1170.........134217...........11648559............803133854

..18....14107.......11648559.........7375608084........3674187761233

..32...139471......803133854......3674187761233....13189629907532856

..58..1177568....46034224561...1507315600099908.38785259210265819578

..94..8721417..2263314310579.526500713340421071

.151.57801225.97590406110264

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..59

EXAMPLE

Some solutions for n=3 k=3

.-3..2..2...-3.-1..3...-3.-3..2...-3.-1..1...-2..0..2...-3.-1..1...-3.-3.-3

..1.-2.-1...-3..1.-2...-1..0..1....0.-3..2...-2..3.-1....1..2.-3....1..2..3

..3.-2..0....0..2..3....0..1..3....2..2..0...-1.-1..2....3..2.-2....2.-1..2

CROSSREFS

Column 1 is A001977

Sequence in context: A281717 A205971 A118016 * A071775 A269594 A134576

Adjacent sequences:  A201986 A201987 A201988 * A201990 A201991 A201992

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 07 2011

STATUS

approved

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Last modified March 20 19:52 EDT 2019. Contains 321349 sequences. (Running on oeis4.)