A201811 - cp's OEIS frontend

A201811 T(n,k)=Number of arrays of n integers in -k..k with sum zero and equal numbers of elements greater than zero and less than zero.

n	a(n)
1	1
2	1
3	3
4	1
5	5
6	7
7	1
8	7
9	13
10	19
11	1
12	9
13	19
14	61
15	51
16	1
17	11
18	25
19	151
20	221
21	141
22	1
23	13
24	31
25	313
26	631
27	1001
28	393
29	1
30	15
31	37
32	571
33	1401
34	4621
35	4145
36	1107
37	1
38	17
39	43
40	949
41	2651
42	15681
43	23857
44	18733
45	3139
46	1
47	19
48	49
49	1471
50	4501
51	42821
52	90609
53	164599
54	82381
55	8953
56	1
57	21
58	55
59	2161

[1, 1, 3, 1, 5, 7, 1, 7, 13, 19, 1, 9, 19, 61, 51, 1, 11, 25, 151, 221, 141, 1, 13, 31, 313, 631, 1001, 393, 1, 15, 37, 571, 1401, 4621, 4145, 1107, 1, 17, 43, 949, 2651, 15681, 23857, 18733, 3139, 1, 19, 49, 1471, 4501, 42821, 90609, 164599, 82381, 8953, 1, 21, 55, 2161]

cp's OEIS Frontend

A201811 T(n,k)=Number of arrays of n integers in -k..k with sum zero and equal numbers of elements greater than zero and less than zero.

Table of values

List of values