A192708 - cp's OEIS frontend

A192708 Number of 8X2 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 8 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	18
4	43
5	97
6	199
7	385
8	707
9	1235
10	2072
11	3383
12	5336
13	8218
14	12341
15	18215
16	26362
17	37488
18	52464
19	72546
20	98944
21	133305
22	177633
23	234514
24	306557
25	397175
26	510188
27	650637
28	823774
29	1035586
30	1293255
31	1606070
32	1982596
33	2433768
34	2972209
35	3612860

[2, 6, 18, 43, 97, 199, 385, 707, 1235, 2072, 3383, 5336, 8218, 12341, 18215, 26362, 37488, 52464, 72546, 98944, 133305, 177633, 234514, 306557, 397175, 510188, 650637, 823774, 1035586, 1293255, 1606070, 1982596, 2433768, 2972209, 3612860]

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Table of values

List of values