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.

A064189 Triangle T(n,k), 0 <= k <= n, read by rows, defined by: T(0,0)=1, T(n,k)=0 if n < k, T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 2
5 1
6 4
7 5
8 3
9 1
10 9
11 12
12 9
13 4
14 1
15 21
16 30
17 25
18 14
19 5
20 1
21 51
22 76
23 69
24 44
25 20
26 6
27 1
28 127
29 196
30 189
31 133
32 70
33 27
34 7
35 1
36 323
37 512
38 518
39 392
40 230
41 104
42 35
43 8
44 1
45 835
46 1353
47 1422
48 1140
49 726
50 369
51 147
52 44
53 9
54 1
55 2188
56 3610
57 3915
58 3288
59 2235
60 1242
61 560
62 200
63 54
64 10
65 1

List of values

[1, 1, 1, 2, 2, 1, 4, 5, 3, 1, 9, 12, 9, 4, 1, 21, 30, 25, 14, 5, 1, 51, 76, 69, 44, 20, 6, 1, 127, 196, 189, 133, 70, 27, 7, 1, 323, 512, 518, 392, 230, 104, 35, 8, 1, 835, 1353, 1422, 1140, 726, 369, 147, 44, 9, 1, 2188, 3610, 3915, 3288, 2235, 1242, 560, 200, 54, 10, 1]