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.

A307819 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 1/sqrt(1 + 2*k*x + k*(k+4)*x^2).

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 -1
5 0
6 1
7 -2
8 -1
9 0
10 1
11 -3
12 0
13 5
14 0
15 1
16 -4
17 3
18 16
19 -5
20 0
21 1
22 -5
23 8
24 27
25 -56
26 -11
27 0
28 1
29 -6
30 15
31 32
32 -189
33 48
34 41
35 0
36 1
37 -7
38 24
39 25
40 -416
41 567
42 384
43 -29
44 0
45 1
46 -8
47 35
48 0
49 -725
50 2176
51 189
52 -1920
53 -125
54 0
55 1
56 -9
57 48
58 -49
59 -1080
60 5625
61 -4864
62 -11259
63 3168
64 365
65 0

List of values

[1, 1, 0, 1, -1, 0, 1, -2, -1, 0, 1, -3, 0, 5, 0, 1, -4, 3, 16, -5, 0, 1, -5, 8, 27, -56, -11, 0, 1, -6, 15, 32, -189, 48, 41, 0, 1, -7, 24, 25, -416, 567, 384, -29, 0, 1, -8, 35, 0, -725, 2176, 189, -1920, -125, 0, 1, -9, 48, -49, -1080, 5625, -4864, -11259, 3168, 365, 0]