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.

A152805 Expansion of 2/(1 + e_q(2x,q)) where e_q(2x,q) is the q-exponential of 2x, as a triangle of coefficients read by rows.

Table of values

n a(n)
0 1
1 -1
2 -1
3 1
4 -1
5 2
6 2
7 -1
8 -1
9 3
10 3
11 0
12 -3
13 -3
14 1
15 -1
16 4
17 3
18 -3
19 -4
20 -14
21 -4
22 -3
23 3
24 4
25 -1
26 -1
27 5
28 2
29 -9
30 -11
31 -19
32 -16
33 -11
34 11
35 16
36 19
37 11
38 9
39 -2
40 -5
41 1
42 -1
43 6
44 0
45 -17
46 -18
47 -25
48 1
49 -7
50 41
51 73
52 83
53 83
54 73
55 41
56 -7
57 1
58 -25
59 -18
60 -17
61 0
62 6
63 -1
64 -1
65 7
66 -3
67 -26
68 -20
69 -17
70 38
71 67

List of values

[1, -1, -1, 1, -1, 2, 2, -1, -1, 3, 3, 0, -3, -3, 1, -1, 4, 3, -3, -4, -14, -4, -3, 3, 4, -1, -1, 5, 2, -9, -11, -19, -16, -11, 11, 16, 19, 11, 9, -2, -5, 1, -1, 6, 0, -17, -18, -25, 1, -7, 41, 73, 83, 83, 73, 41, -7, 1, -25, -18, -17, 0, 6, -1, -1, 7, -3, -26, -20, -17, 38, 67]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.