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 | 2 |
| 2 | 14 |
| 3 | 18 |
| 4 | 32 |
| 5 | 42 |
| 6 | 72 |
| 7 | 144 |
| 8 | 174 |
| 9 | 282 |
| 10 | 318 |
| 11 | 828 |
| 12 | 1338 |
| 13 | 2154 |
| 14 | 2750 |
| 15 | 4034 |
| 16 | 9858 |
| 17 | 13692 |
| 18 | 49052 |
| 19 | 63522 |
| 20 | 86784 |
| 21 | 117162 |
| 22 | 126014 |
| 23 | 273090 |
| 24 | 302574 |
| 25 | 413862 |
| 26 | 901902 |
| 27 | 3231474 |
| 28 | 4097700 |