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.

A348400 a(1) = 1; a(n+1) = a(n) + n if the digit sum of a(n) is already in the sequence, otherwise a(n+1) = digitsum(a(n)).

Table of values

n a(n)
1 1
2 2
3 4
4 7
5 11
6 16
7 22
8 29
9 37
10 10
11 20
12 31
13 43
14 56
15 70
16 85
17 13
18 30
19 3
20 22
21 42
22 6
23 28
24 51
25 75
26 12
27 38
28 65
29 93
30 122
31 5
32 36
33 9
34 42
35 76
36 111
37 147
38 184
39 222
40 261
41 301
42 342
43 384
44 15
45 59
46 14
47 60
48 107
49 8
50 57
51 107
52 158
53 210
54 263
55 317
56 372
57 428
58 485
59 17
60 76
61 136
62 197
63 259

List of values

[1, 2, 4, 7, 11, 16, 22, 29, 37, 10, 20, 31, 43, 56, 70, 85, 13, 30, 3, 22, 42, 6, 28, 51, 75, 12, 38, 65, 93, 122, 5, 36, 9, 42, 76, 111, 147, 184, 222, 261, 301, 342, 384, 15, 59, 14, 60, 107, 8, 57, 107, 158, 210, 263, 317, 372, 428, 485, 17, 76, 136, 197, 259]

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

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