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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.

A106634 Number of ways to express n as i*j+k*l, with i,j,k,l in the range [0..n].

Table of values

n a(n)
0 1
1 6
2 21
3 32
4 62
5 58
6 124
7 88
8 173
9 158
10 226
11 156
12 380
13 194
14 340
15 356
16 466
17 274
18 613
19 316
20 690
21 536
22 596
23 404
24 1060
25 552
26 734
27 728
28 1032
29 546
30 1376
31 596
32 1213
33 932
34 1026
35 976
36 1858
37 750
38 1180
39 1144
40 1910
41 854
42 2048
43 908
44 1784
45 1730
46 1500
47 1016
48 2800

List of values

[1, 6, 21, 32, 62, 58, 124, 88, 173, 158, 226, 156, 380, 194, 340, 356, 466, 274, 613, 316, 690, 536, 596, 404, 1060, 552, 734, 728, 1032, 546, 1376, 596, 1213, 932, 1026, 976, 1858, 750, 1180, 1144, 1910, 854, 2048, 908, 1784, 1730, 1500, 1016, 2800]

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

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