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.

A364929 a(0) = 0; for n > 0, if n appears in the sequence then a(n) is the product of the indices of all previous appearances of n. Otherwise a(n) = a(n-1) - n if nonnegative and not already in the sequence, otherwise a(n) = a(n-1) + n.

Table of values

n a(n)
0 0
1 1
2 3
3 2
4 6
5 11
6 4
7 11
8 19
9 10
10 9
11 35
12 23
13 36
14 22
15 7
16 23
17 40
18 58
19 8
20 28
21 49
22 14
23 192
24 168
25 143
26 117
27 90
28 20
29 49
30 79
31 48
32 16
33 49
34 15
35 11
36 13
37 50
38 12
39 51
40 17
41 58
42 100
43 57
44 101
45 56
46 102
47 55
48 31
49 20097
50 37
51 39
52 91
53 38
54 92
55 47
56 45
57 43
58 738
59 679
60 619
61 558
62 496
63 433
64 369

List of values

[0, 1, 3, 2, 6, 11, 4, 11, 19, 10, 9, 35, 23, 36, 22, 7, 23, 40, 58, 8, 28, 49, 14, 192, 168, 143, 117, 90, 20, 49, 79, 48, 16, 49, 15, 11, 13, 50, 12, 51, 17, 58, 100, 57, 101, 56, 102, 55, 31, 20097, 37, 39, 91, 38, 92, 47, 45, 43, 738, 679, 619, 558, 496, 433, 369]