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 | 38 |
| 2 | 740 |
| 3 | 9842 |
| 4 | 100528 |
| 5 | 840750 |
| 6 | 5994443 |
| 7 | 37460020 |
| 8 | 209355471 |
| 9 | 1062545094 |
| 10 | 4956417103 |
| 11 | 21455163508 |
| 12 | 86870115631 |
| 13 | 331163611782 |
| 14 | 1195264474584 |
| 15 | 4103926538058 |
| 16 | 13459612095894 |
| 17 | 42317155173498 |
| 18 | 127942640917705 |