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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.

A257693 Numbers such that the smallest nonzero digit present (A257679) in their factorial base representation is 3.

Table of values

n a(n)
1 18
2 72
3 90
4 114
5 360
6 378
7 432
8 450
9 456
10 474
11 498
12 552
13 570
14 594
15 618
16 672
17 690
18 714
19 2160
20 2178
21 2232
22 2250
23 2256
24 2274
25 2520
26 2538
27 2592
28 2610
29 2616
30 2634
31 2640
32 2658
33 2712
34 2730
35 2736
36 2754
37 2760
38 2778
39 2832
40 2850
41 2856
42 2874
43 2898
44 2952
45 2970
46 2994
47 3240
48 3258
49 3312
50 3330
51 3336
52 3354
53 3378
54 3432
55 3450
56 3474
57 3498
58 3552

List of values

[18, 72, 90, 114, 360, 378, 432, 450, 456, 474, 498, 552, 570, 594, 618, 672, 690, 714, 2160, 2178, 2232, 2250, 2256, 2274, 2520, 2538, 2592, 2610, 2616, 2634, 2640, 2658, 2712, 2730, 2736, 2754, 2760, 2778, 2832, 2850, 2856, 2874, 2898, 2952, 2970, 2994, 3240, 3258, 3312, 3330, 3336, 3354, 3378, 3432, 3450, 3474, 3498, 3552]

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

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