**Ceiling(n^2/2).**

*0, 1, 2, 5, 8, 13, 18, 25, 32, 41, 50, 61, 72, 85, 98, 113, 128, 145, 162, 181, 200, 221*

*3 seqfan posts*

*Sun Jan 2 20:42:19 CET 2011* [seqfan] Re: T(n, k)=Number of nondecreasing arrangements of n numbers in -k..k with sum zero

*Sun Jan 2 19:46:21 CET 2011* [seqfan] Re: T(n, k)=Number of nondecreasing arrangements of n numbers in -k..k with sum zero

*Tue Dec 14 01:40:21 CET 2010* [seqfan] T(n, k)=Number of nondecreasing arrangements of n numbers in -k..k with sum zero

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

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