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.

A090181 Triangle of Narayana (A001263) with 0 <= k <= n, read by rows.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 1
6 0
7 1
8 3
9 1
10 0
11 1
12 6
13 6
14 1
15 0
16 1
17 10
18 20
19 10
20 1
21 0
22 1
23 15
24 50
25 50
26 15
27 1
28 0
29 1
30 21
31 105
32 175
33 105
34 21
35 1
36 0
37 1
38 28
39 196
40 490
41 490
42 196
43 28
44 1
45 0
46 1
47 36
48 336
49 1176
50 1764
51 1176
52 336
53 36
54 1
55 0
56 1
57 45
58 540
59 2520
60 5292
61 5292
62 2520
63 540
64 45
65 1
66 0
67 1
68 55
69 825
70 4950
71 13860

List of values

[1, 0, 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, 1, 55, 825, 4950, 13860]