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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.

A209599 Triangle T(n,k), read by rows, given by (2, -1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (0, 1/2, -1/2, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.

Table of values

n a(n)
0 1
1 2
2 0
3 3
4 1
5 0
6 5
7 3
8 0
9 0
10 8
11 7
12 1
13 0
14 0
15 13
16 15
17 4
18 0
19 0
20 0
21 21
22 30
23 12
24 1
25 0
26 0
27 0
28 34
29 58
30 31
31 5
32 0
33 0
34 0
35 0
36 55
37 109
38 73
39 18
40 1
41 0
42 0
43 0
44 0
45 89
46 201
47 162
48 54
49 6
50 0
51 0
52 0
53 0
54 0
55 144
56 365
57 344
58 145
59 25
60 1
61 0
62 0
63 0
64 0
65 0

List of values

[1, 2, 0, 3, 1, 0, 5, 3, 0, 0, 8, 7, 1, 0, 0, 13, 15, 4, 0, 0, 0, 21, 30, 12, 1, 0, 0, 0, 34, 58, 31, 5, 0, 0, 0, 0, 55, 109, 73, 18, 1, 0, 0, 0, 0, 89, 201, 162, 54, 6, 0, 0, 0, 0, 0, 144, 365, 344, 145, 25, 1, 0, 0, 0, 0, 0]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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