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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.

A192695 Number of 1X8 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 8-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 42
4 147
5 415
6 1040
7 2336
8 4841
9 9324
10 17035
11 29556
12 49428
13 79553
14 124531
15 189360
16 281680
17 409383
18 584737
19 819889
20 1133021
21 1541844
22 2072913
23 2751299
24 3615478
25 4697427
26 6051068
27 7720384
28 9776322
29 12276825
30 15316939
31 18967552

List of values

[2, 10, 42, 147, 415, 1040, 2336, 4841, 9324, 17035, 29556, 49428, 79553, 124531, 189360, 281680, 409383, 584737, 819889, 1133021, 1541844, 2072913, 2751299, 3615478, 4697427, 6051068, 7720384, 9776322, 12276825, 15316939, 18967552]

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

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