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.

A370018 Expansion of Sum_{n>=0} (-4)^n * (2*4^n + 1)/3 * x^(n*(n+1)/2).

Table of values

n a(n)
0 1
1 -12
2 0
3 176
4 0
5 0
6 -2752
7 0
8 0
9 0
10 43776
11 0
12 0
13 0
14 0
15 -699392
16 0
17 0
18 0
19 0
20 0
21 11186176
22 0
23 0
24 0
25 0
26 0
27 0
28 -178962432
29 0
30 0
31 0
32 0
33 0
34 0
35 0
36 2863333376
37 0
38 0
39 0
40 0
41 0
42 0
43 0
44 0
45 -45813071872
46 0
47 0
48 0
49 0
50 0
51 0
52 0
53 0
54 0
55 733008101376
56 0
57 0
58 0
59 0
60 0
61 0
62 0
63 0
64 0
65 0
66 -11728125427712

List of values

[1, -12, 0, 176, 0, 0, -2752, 0, 0, 0, 43776, 0, 0, 0, 0, -699392, 0, 0, 0, 0, 0, 11186176, 0, 0, 0, 0, 0, 0, -178962432, 0, 0, 0, 0, 0, 0, 0, 2863333376, 0, 0, 0, 0, 0, 0, 0, 0, -45813071872, 0, 0, 0, 0, 0, 0, 0, 0, 0, 733008101376, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -11728125427712]