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.

A206831 Triangle T(n,k), read by rows, given by (1, -2, 1, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.

Table of values

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

List of values

[1, 1, 1, -1, 0, 1, -1, -3, -1, 1, 1, 0, -4, -2, 1, 1, 5, 4, -4, -3, 1, -1, 0, 9, 10, -3, -4, 1, -1, -7, -9, 9, 17, -1, -5, 1, 1, 0, -16, -28, 2, 24, 2, -6, 1, 1, 9, 16, -16, -54, -14, 30, 6, -7, 1, -1, 0, 25, 60, 10]