A203292 - cp's OEIS frontend

A203292 Number of arrays of 4 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

n	a(n)
1	3
2	6
3	12
4	21
5	35
6	54
7	80
8	113
9	155
10	206
11	268
12	341
13	427
14	526
15	640
16	769
17	915
18	1078
19	1260
20	1461
21	1683
22	1926
23	2192
24	2481
25	2795
26	3134
27	3500
28	3893
29	4315
30	4766
31	5248
32	5761
33	6307
34	6886
35	7500
36	8149
37	8835
38	9558
39	10320
40	11121
41	11963
42	12846
43	13772
44	14741
45	15755

[3, 6, 12, 21, 35, 54, 80, 113, 155, 206, 268, 341, 427, 526, 640, 769, 915, 1078, 1260, 1461, 1683, 1926, 2192, 2481, 2795, 3134, 3500, 3893, 4315, 4766, 5248, 5761, 6307, 6886, 7500, 8149, 8835, 9558, 10320, 11121, 11963, 12846, 13772, 14741, 15755]

cp's OEIS Frontend

A203292 Number of arrays of 4 nondecreasing integers in -n..n with sum zero and equal numbers greater than zero and less than zero.

Table of values

List of values