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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A192697 Number of 1X10 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 <= 2*n^2 (number of collections of 1 zero-sum 10-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).

Table of values

n a(n)
1 2
2 10
3 54
4 223
5 758
6 2239
7 5888
8 14055
9 30973
10 64220
11 125681
12 234793
13 421151
14 728848
15 1221122
16 1990599
17 3162071
18 4910443
19 7471318
20 11154759
21 16368766
22 23649285
23 33671936
24 47306193
25 65642371
26 90041983
27 122175046
28 164141152
29 218451247

List of values

[2, 10, 54, 223, 758, 2239, 5888, 14055, 30973, 64220, 125681, 234793, 421151, 728848, 1221122, 1990599, 3162071, 4910443, 7471318, 11154759, 16368766, 23649285, 33671936, 47306193, 65642371, 90041983, 122175046, 164141152, 218451247]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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