A192706 - cp's OEIS frontend

A192706 Number of 6X2 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 6 zero-sum 2-vectors with total modulus squared not more than 2n^2, ignoring vector and component permutations).

n	a(n)
1	2
2	6
3	16
4	34
5	71
6	135
7	235
8	396
9	641
10	993
11	1496
12	2193
13	3136
14	4398
15	6065
16	8214
17	10949
18	14438
19	18760
20	24151
21	30736
22	38755
23	48448
24	60129
25	73970
26	90426
27	109793
28	132568
29	158991
30	189853
31	225331
32	266394
33	313294
34	367015
35	428094
36	497667
37	575969
38	664608

[2, 6, 16, 34, 71, 135, 235, 396, 641, 993, 1496, 2193, 3136, 4398, 6065, 8214, 10949, 14438, 18760, 24151, 30736, 38755, 48448, 60129, 73970, 90426, 109793, 132568, 158991, 189853, 225331, 266394, 313294, 367015, 428094, 497667, 575969, 664608]

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Table of values

List of values