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.

A172249 Triangle, read by rows, given by [0,1/3,-1/3,0,0,0,0,0,0,0,...] DELTA [3,-1/3,1/3,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.

Table of values

n a(n)
0 1
1 0
2 3
3 0
4 1
5 8
6 0
7 0
8 6
9 21
10 0
11 0
12 1
13 25
14 55
15 0
16 0
17 0
18 9
19 90
20 144
21 0
22 0
23 0
24 1
25 51
26 300
27 377
28 0
29 0
30 0
31 0
32 12
33 234
34 954
35 987
36 0
37 0
38 0
39 0
40 1
41 86
42 951
43 2939
44 2584
45 0
46 0
47 0
48 0
49 0
50 15
51 480
52 3573
53 8850
54 6765
55 0
56 0
57 0
58 0
59 0
60 1
61 130
62 2305
63 12707
64 26195
65 17711
66 0
67 0
68 0
69 0
70 0
71 0
72 18
73 855

List of values

[1, 0, 3, 0, 1, 8, 0, 0, 6, 21, 0, 0, 1, 25, 55, 0, 0, 0, 9, 90, 144, 0, 0, 0, 1, 51, 300, 377, 0, 0, 0, 0, 12, 234, 954, 987, 0, 0, 0, 0, 1, 86, 951, 2939, 2584, 0, 0, 0, 0, 0, 15, 480, 3573, 8850, 6765, 0, 0, 0, 0, 0, 1, 130, 2305, 12707, 26195, 17711, 0, 0, 0, 0, 0, 0, 18, 855]