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.

A131198 Triangle T(n,k), 0 <= k <= n, read by rows, given by [1,0,1,0,1,0,1,0,...] DELTA [0,1,0,1,0,1,0,1,...] where DELTA is the operator defined in A084938.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 1
5 0
6 1
7 3
8 1
9 0
10 1
11 6
12 6
13 1
14 0
15 1
16 10
17 20
18 10
19 1
20 0
21 1
22 15
23 50
24 50
25 15
26 1
27 0
28 1
29 21
30 105
31 175
32 105
33 21
34 1
35 0
36 1
37 28
38 196
39 490
40 490
41 196
42 28
43 1
44 0
45 1
46 36
47 336
48 1176
49 1764
50 1176
51 336
52 36
53 1
54 0
55 1
56 45
57 540
58 2520
59 5292
60 5292
61 2520
62 540
63 45
64 1
65 0

List of values

[1, 1, 0, 1, 1, 0, 1, 3, 1, 0, 1, 6, 6, 1, 0, 1, 10, 20, 10, 1, 0, 1, 15, 50, 50, 15, 1, 0, 1, 21, 105, 175, 105, 21, 1, 0, 1, 28, 196, 490, 490, 196, 28, 1, 0, 1, 36, 336, 1176, 1764, 1176, 336, 36, 1, 0, 1, 45, 540, 2520, 5292, 5292, 2520, 540, 45, 1, 0]