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.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 12 |
| 3 | 15 |
| 4 | 48 |
| 5 | 51 |
| 6 | 60 |
| 7 | 63 |
| 8 | 192 |
| 9 | 195 |
| 10 | 204 |
| 11 | 207 |
| 12 | 240 |
| 13 | 243 |
| 14 | 252 |
| 15 | 255 |
| 16 | 768 |
| 17 | 771 |
| 18 | 780 |
| 19 | 783 |
| 20 | 816 |
| 21 | 819 |
| 22 | 828 |
| 23 | 831 |
| 24 | 960 |
| 25 | 963 |
| 26 | 972 |
| 27 | 975 |
| 28 | 1008 |
| 29 | 1011 |
| 30 | 1020 |
| 31 | 1023 |
| 32 | 3072 |
| 33 | 3075 |
| 34 | 3084 |
| 35 | 3087 |
| 36 | 3120 |
| 37 | 3123 |
| 38 | 3132 |
| 39 | 3135 |
| 40 | 3264 |
| 41 | 3267 |
| 42 | 3276 |
| 43 | 3279 |
| 44 | 3312 |
| 45 | 3315 |
| 46 | 3324 |
| 47 | 3327 |
| 48 | 3840 |
| 49 | 3843 |