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.

A307847 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 - 2*x + (1-4*k^2)*x^2).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 3
9 1
10 1
11 1
12 9
13 7
14 1
15 1
16 1
17 19
18 25
19 19
20 1
21 1
22 1
23 33
24 55
25 145
26 51
27 1
28 1
29 1
30 51
31 97
32 595
33 561
34 141
35 1
36 1
37 1
38 73
39 151
40 1729
41 2611
42 2841
43 393
44 1
45 1
46 1
47 99
48 217
49 4051
50 8001
51 22141
52 12489
53 1107
54 1
55 1
56 1
57 129
58 295
59 8209
60 19251
61 105441
62 119449
63 60705
64 3139
65 1

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 9, 7, 1, 1, 1, 19, 25, 19, 1, 1, 1, 33, 55, 145, 51, 1, 1, 1, 51, 97, 595, 561, 141, 1, 1, 1, 73, 151, 1729, 2611, 2841, 393, 1, 1, 1, 99, 217, 4051, 8001, 22141, 12489, 1107, 1, 1, 1, 129, 295, 8209, 19251, 105441, 119449, 60705, 3139, 1]