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.

A142992 Square array, read by ascending antidiagonals, of the crystal ball sequences for the root lattices of type C_n.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 3
5 1
6 1
7 9
8 5
9 1
10 1
11 19
12 25
13 7
14 1
15 1
16 33
17 85
18 49
19 9
20 1
21 1
22 51
23 225
24 231
25 81
26 11
27 1
28 1
29 73
30 501
31 833
32 489
33 121
34 13
35 1
36 1
37 99
38 985
39 2471
40 2241
41 891
42 169
43 15
44 1
45 1
46 129
47 1765
48 6321
49 8361
50 4961
51 1469
52 225
53 17
54 1

List of values

[1, 1, 1, 1, 3, 1, 1, 9, 5, 1, 1, 19, 25, 7, 1, 1, 33, 85, 49, 9, 1, 1, 51, 225, 231, 81, 11, 1, 1, 73, 501, 833, 489, 121, 13, 1, 1, 99, 985, 2471, 2241, 891, 169, 15, 1, 1, 129, 1765, 6321, 8361, 4961, 1469, 225, 17, 1]