A192711 - cp's OEIS frontend

A192711 Number of 10 X 2 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 10 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	19
4	49
5	118
6	259
7	534
8	1042
9	1941
10	3465
11	5996
12	10040
13	16364
14	26012
15	40522
16	61835
17	92657
18	136556
19	198316
20	283977
21	401349
22	560438
23	774140
24	1058263
25	1432174
26	1920672
27	2554179
28	3369134
29	4409927
30	5730887
31	7397192
32	9486111
33	12090252
34	15318436

[2, 6, 19, 49, 118, 259, 534, 1042, 1941, 3465, 5996, 10040, 16364, 26012, 40522, 61835, 92657, 136556, 198316, 283977, 401349, 560438, 774140, 1058263, 1432174, 1920672, 2554179, 3369134, 4409927, 5730887, 7397192, 9486111, 12090252, 15318436]

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Table of values

List of values