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.

A331791 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 - 2*k*x + ((k-2)*x)^2 + (1 - k*x) * sqrt(1 - 2*k*x + ((k-2)*x)^2)).

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 -3
6 1
7 4
8 3
9 0
10 1
11 6
12 15
13 4
14 10
15 1
16 8
17 33
18 56
19 5
20 0
21 1
22 10
23 57
24 180
25 210
26 6
27 -35
28 1
29 12
30 87
31 400
32 985
33 792
34 7
35 0
36 1
37 14
38 123
39 740
40 2810
41 5418
42 3003
43 8
44 126
45 1
46 16
47 165
48 1224
49 6285
50 19824
51 29953
52 11440
53 9
54 0
55 1
56 18
57 213
58 1876
59 12130
60 53550
61 140497
62 166344
63 43758
64 10
65 -462

List of values

[1, 1, 0, 1, 2, -3, 1, 4, 3, 0, 1, 6, 15, 4, 10, 1, 8, 33, 56, 5, 0, 1, 10, 57, 180, 210, 6, -35, 1, 12, 87, 400, 985, 792, 7, 0, 1, 14, 123, 740, 2810, 5418, 3003, 8, 126, 1, 16, 165, 1224, 6285, 19824, 29953, 11440, 9, 0, 1, 18, 213, 1876, 12130, 53550, 140497, 166344, 43758, 10, -462]