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 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 7 |
| 4 | 12 |
| 5 | 19 |
| 6 | 31 |
| 7 | 174 |
| 8 | 205 |
| 9 | 789 |
| 10 | 2572 |
| 11 | 3361 |
| 12 | 9294 |
| 13 | 12655 |
| 14 | 97879 |
| 15 | 7647217 |
| 16 | 15392313 |
| 17 | 207747286 |
| 18 | 1054128743 |
| 19 | 2316004772 |
| 20 | 24214176463 |
| 21 | 74958534161 |
| 22 | 174131244785 |
| 23 | 3557583429861 |
| 24 | 3731714674646 |
| 25 | 14752727453799 |
| 26 | 77495351943641 |