cp's OEIS Frontend

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.

A280934 Number of 2 X 2 matrices with all elements in {0,..,n} and (sum of terms) = permanent.

Table of values

n a(n)
0 1
1 1
2 4
3 36
4 52
5 76
6 92
7 116
8 136
9 160
10 176
11 208
12 224
13 248
14 272
15 300
16 316
17 348
18 364
19 396
20 420
21 444
22 460
23 500
24 520
25 544
26 568
27 600
28 616
29 656
30 672
31 704
32 728
33 752
34 776
35 820
36 836
37 860
38 884
39 924
40 940
41 980
42 996
43 1028
44 1060
45 1084
46 1100
47 1148
48 1168
49 1200
50 1224
51 1256
52 1272
53 1312
54 1336
55 1376
56 1400
57 1424
58 1440
59 1496
60 1512
61 1536

List of values

[1, 1, 4, 36, 52, 76, 92, 116, 136, 160, 176, 208, 224, 248, 272, 300, 316, 348, 364, 396, 420, 444, 460, 500, 520, 544, 568, 600, 616, 656, 672, 704, 728, 752, 776, 820, 836, 860, 884, 924, 940, 980, 996, 1028, 1060, 1084, 1100, 1148, 1168, 1200, 1224, 1256, 1272, 1312, 1336, 1376, 1400, 1424, 1440, 1496, 1512, 1536]