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.

A099647 Function f[n]=1+Sum[digit^2 of n] is iterated as in A099646. Values x for which A099646[x]=1 are listed here. These terms are analogous to happy-numbers [=A007770].

Table of values

n a(n)
1 35
2 36
3 46
4 53
5 57
6 63
7 64
8 75
9 135
10 138
11 153
12 156
13 165
14 183
15 237
16 245
17 246
18 254
19 264
20 273
21 279
22 297
23 305
24 306
25 315
26 318
27 327
28 334
29 343
30 347
31 350
32 351
33 360
34 372
35 374
36 381
37 388
38 406
39 425
40 426
41 433
42 437
43 452
44 460
45 462
46 473
47 503
48 507
49 513
50 516
51 524
52 530
53 531

List of values

[35, 36, 46, 53, 57, 63, 64, 75, 135, 138, 153, 156, 165, 183, 237, 245, 246, 254, 264, 273, 279, 297, 305, 306, 315, 318, 327, 334, 343, 347, 350, 351, 360, 372, 374, 381, 388, 406, 425, 426, 433, 437, 452, 460, 462, 473, 503, 507, 513, 516, 524, 530, 531]

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

Content is available under The OEIS End-User License Agreement.