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A188333 T(n,k)=Number of nondecreasing arrangements of n nonzero numbers in -(n+k-2)..(n+k-2) with sum zero 15

%I

%S 0,0,1,0,2,2,0,3,4,10,0,4,8,20,40,0,5,12,37,86,197,0,6,18,61,166,424,

%T 980,0,7,24,94,288,828,2128,5142,0,8,32,136,472,1488,4238,11200,27632,

%U 0,9,40,191,726,2519,7836,22563,60372,152191,0,10,50,257,1076,4050,13694,42593

%N T(n,k)=Number of nondecreasing arrangements of n nonzero numbers in -(n+k-2)..(n+k-2) with sum zero

%C Table starts

%C ......0......0......0.......0.......0.......0.......0........0........0

%C ......1......2......3.......4.......5.......6.......7........8........9

%C ......2......4......8......12......18......24......32.......40.......50

%C .....10.....20.....37......61......94.....136.....191......257......338

%C .....40.....86....166.....288.....472.....726....1076.....1534.....2130

%C ....197....424....828....1488....2519....4050....6252.....9314....13479

%C ....980...2128...4238....7836...13694...22786...36454....56314....84496

%C ...5142..11200..22563...42593...76251..130453..214784...341988...528926

%C ..27632..60372.122986..236130..431488..755434.1274786..2082546..3306612

%C .152191.333254.684809.1333130.2477726.4423012.7621670.12729304.20676601

%H R. H. Hardin, <a href="/A188333/b188333.txt">Table of n, a(n) for n = 1..430</a>

%e Some solutions for n=8 k=6

%e .-8...-9..-12..-11..-12...-9...-9...-6..-11...-8..-12..-12..-12...-9..-11...-9

%e .-5...-7...-7...-7...-5...-6...-8...-6...-7...-7...-6..-12..-10...-6..-10...-7

%e .-1...-6....1...-4...-2...-3...-3...-6...-4...-4...-4...-1...-6...-2...-4...-1

%e .-1....1....1...-4...-2...-3....3...-5...-4....1...-4....2....4....1...-4...-1

%e .-1....1....2....3...-2....2....3...-5....5....1....1....4....4....1....4....1

%e ..3....2....3....6....4....4....3....5....6....3....2....4....5....3....6....5

%e ..3....9....5....8....8....7....4...11....6....4...11....4....6....5....9....6

%e .10....9....7....9...11....8....7...12....9...10...12...11....9....7...10....6

%Y Row 3 is A007590(n+1)

%K nonn,tabl

%O 1,5

%A _R. H. Hardin_ Mar 28 2011

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Last modified June 24 22:23 EDT 2021. Contains 345445 sequences. (Running on oeis4.)