A192693 - cp's OEIS frontend

A192693 Number of 1X6 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 1 zero-sum 6-vectors with total modulus squared not more than 2n^2, ignoring vector and component permutations).

n	a(n)
1	2
2	9
3	28
4	78
5	171
6	350
7	650
8	1142
9	1868
10	2949
11	4454
12	6554
13	9361
14	13071
15	17829
16	23929
17	31576
18	41080
19	52705
20	66899
21	83871
22	104326
23	128432
24	156793
25	190022
26	228672
27	273250
28	324752
29	383434
30	450569
31	526647
32	612832
33	709667
34	818736
35	940570
36	1076447
37	1227802

[2, 9, 28, 78, 171, 350, 650, 1142, 1868, 2949, 4454, 6554, 9361, 13071, 17829, 23929, 31576, 41080, 52705, 66899, 83871, 104326, 128432, 156793, 190022, 228672, 273250, 324752, 383434, 450569, 526647, 612832, 709667, 818736, 940570, 1076447, 1227802]

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Table of values

List of values