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.

A198681 Nonnegative multiples of 3 whose sum of base-3 digits are of the form 3k+1.

Table of values

n a(n)
1 3
2 9
3 24
4 27
5 42
6 48
7 60
8 66
9 72
10 81
11 96
12 102
13 114
14 120
15 126
16 138
17 144
18 159
19 168
20 174
21 180
22 192
23 198
24 213
25 216
26 231
27 237
28 243
29 258
30 264
31 276
32 282
33 288
34 300
35 306
36 321
37 330
38 336
39 342
40 354
41 360
42 375
43 378
44 393
45 399
46 408
47 414
48 429
49 432
50 447
51 453
52 465
53 471
54 477
55 492
56 498

List of values

[3, 9, 24, 27, 42, 48, 60, 66, 72, 81, 96, 102, 114, 120, 126, 138, 144, 159, 168, 174, 180, 192, 198, 213, 216, 231, 237, 243, 258, 264, 276, 282, 288, 300, 306, 321, 330, 336, 342, 354, 360, 375, 378, 393, 399, 408, 414, 429, 432, 447, 453, 465, 471, 477, 492, 498]