A192694 - cp's OEIS frontend

A192694 Number of 1X7 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 7-vectors with total modulus squared not more than 2n^2, ignoring vector and component permutations).

n	a(n)
1	2
2	9
3	36
4	110
5	277
6	634
7	1304
8	2492
9	4430
10	7559
11	12260
12	19272
13	29251
14	43339
15	62515
16	88501
17	122666
18	167322
19	224735
20	297919
21	389439
22	504010
23	644682
24	817003
25	1025762
26	1278054
27	1578938
28	1938210
29	2360862
30	2859571
31	3441853
32	4122058
33	4907573
34	5817118

[2, 9, 36, 110, 277, 634, 1304, 2492, 4430, 7559, 12260, 19272, 29251, 43339, 62515, 88501, 122666, 167322, 224735, 297919, 389439, 504010, 644682, 817003, 1025762, 1278054, 1578938, 1938210, 2360862, 2859571, 3441853, 4122058, 4907573, 5817118]

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Table of values

List of values