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.

A028837 Iterated sum of digits of n is a square.

Table of values

n a(n)
1 1
2 4
3 9
4 10
5 13
6 18
7 19
8 22
9 27
10 28
11 31
12 36
13 37
14 40
15 45
16 46
17 49
18 54
19 55
20 58
21 63
22 64
23 67
24 72
25 73
26 76
27 81
28 82
29 85
30 90
31 91
32 94
33 99
34 100
35 103
36 108
37 109
38 112
39 117
40 118
41 121
42 126
43 127
44 130
45 135
46 136
47 139
48 144
49 145
50 148
51 153
52 154
53 157
54 162
55 163
56 166
57 171
58 172
59 175
60 180

List of values

[1, 4, 9, 10, 13, 18, 19, 22, 27, 28, 31, 36, 37, 40, 45, 46, 49, 54, 55, 58, 63, 64, 67, 72, 73, 76, 81, 82, 85, 90, 91, 94, 99, 100, 103, 108, 109, 112, 117, 118, 121, 126, 127, 130, 135, 136, 139, 144, 145, 148, 153, 154, 157, 162, 163, 166, 171, 172, 175, 180]