A192701 - cp's OEIS frontend

A192701 Number of 3X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2n^2 (number of collections of 3 zero-sum 2-vectors with total modulus squared not more than 2n^2, ignoring vector and component permutations).

n	a(n)
1	2
2	5
3	10
4	16
5	27
6	42
7	58
8	80
9	110
10	143
11	182
12	226
13	281
14	343
15	413
16	489
17	576
18	676
19	783
20	901
21	1035
22	1172
23	1328
24	1493
25	1674
26	1872
27	2086
28	2308
29	2544
30	2805
31	3069
32	3364
33	3679
34	4000
35	4348
36	4709
37	5096
38	5493
39	5926
40	6366
41	6832
42	7330
43	7841
44	8380
45	8950
46	9528
47	10134
48	10766

[2, 5, 10, 16, 27, 42, 58, 80, 110, 143, 182, 226, 281, 343, 413, 489, 576, 676, 783, 901, 1035, 1172, 1328, 1493, 1674, 1872, 2086, 2308, 2544, 2805, 3069, 3364, 3679, 4000, 4348, 4709, 5096, 5493, 5926, 6366, 6832, 7330, 7841, 8380, 8950, 9528, 10134, 10766]

cp's OEIS Frontend

Table of values

List of values