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) |
|---|---|
| 1 | 3 |
| 2 | 15 |
| 3 | 195 |
| 4 | 255 |
| 5 | 483 |
| 6 | 783 |
| 7 | 1023 |
| 8 | 1155 |
| 9 | 1295 |
| 10 | 1443 |
| 11 | 1599 |
| 12 | 2703 |
| 13 | 3363 |
| 14 | 4623 |
| 15 | 4899 |
| 16 | 5183 |
| 17 | 6399 |
| 18 | 6723 |
| 19 | 7395 |
| 20 | 7743 |
| 21 | 8463 |
| 22 | 8835 |
| 23 | 10815 |
| 24 | 11235 |
| 25 | 11663 |
| 26 | 12099 |
| 27 | 12543 |
| 28 | 15375 |
| 29 | 16383 |
| 30 | 16899 |
| 31 | 17955 |
| 32 | 18495 |
| 33 | 20163 |
| 34 | 24963 |
| 35 | 25599 |
| 36 | 26895 |
| 37 | 27555 |
| 38 | 31683 |
| 39 | 33855 |
| 40 | 35343 |
| 41 | 36099 |
| 42 | 37635 |