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 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 15 |
| 6 | 26 |
| 7 | 31 |
| 8 | 43 |
| 9 | 98 |
| 10 | 117 |
| 11 | 140 |
| 12 | 215 |
| 13 | 540 |
| 14 | 1945 |
| 15 | 22279 |
| 16 | 38459 |
| 17 | 39461 |
| 18 | 66869 |
| 19 | 69328 |
| 20 | 4047994 |
| 21 | 4615259 |
| 22 | 5617480 |
| 23 | 5898979 |
| 24 | 9685120 |
| 25 | 9751023 |