A192692 - cp's OEIS frontend

A192692 Number of 1X5 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 5-vectors with total modulus squared not more than 2n^2, ignoring vector and component permutations).

n	a(n)
1	2
2	8
3	21
4	48
5	93
6	170
7	285
8	452
9	674
10	985
11	1379
12	1894
13	2524
14	3307
15	4272
16	5414
17	6790
18	8406
19	10290
20	12475
21	14998
22	17857
23	21159
24	24847
25	29047
26	33708
27	38944
28	44737
29	51180
30	58301
31	66094
32	74687
33	84097
34	94333
35	105510
36	117600
37	130807
38	144983
39	160325
40	176837

[2, 8, 21, 48, 93, 170, 285, 452, 674, 985, 1379, 1894, 2524, 3307, 4272, 5414, 6790, 8406, 10290, 12475, 14998, 17857, 21159, 24847, 29047, 33708, 38944, 44737, 51180, 58301, 66094, 74687, 84097, 94333, 105510, 117600, 130807, 144983, 160325, 176837]

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Table of values

List of values