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.

A387466 Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 - 4*x - (2*k*x)^2).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 2
5 6
6 1
7 2
8 8
9 20
10 1
11 2
12 14
13 32
14 70
15 1
16 2
17 24
18 68
19 136
20 252
21 1
22 2
23 38
24 128
25 406
26 592
27 924
28 1
29 2
30 56
31 212
32 1096
33 2332
34 2624
35 3432
36 1
37 2
38 78
39 320
40 2566
41 7632
42 13964
43 11776
44 12870
45 1
46 2
47 104
48 452
49 5320
50 20092
51 60864
52 83848
53 53344
54 48620

List of values

[1, 1, 2, 1, 2, 6, 1, 2, 8, 20, 1, 2, 14, 32, 70, 1, 2, 24, 68, 136, 252, 1, 2, 38, 128, 406, 592, 924, 1, 2, 56, 212, 1096, 2332, 2624, 3432, 1, 2, 78, 320, 2566, 7632, 13964, 11776, 12870, 1, 2, 104, 452, 5320, 20092, 60864, 83848, 53344, 48620]