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 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 41 |
| 5 | 346 |
| 6 | 3797 |
| 7 | 51157 |
| 8 | 816356 |
| 9 | 15050581 |
| 10 | 314726117 |
| 11 | 7359554632 |
| 12 | 190283748371 |
| 13 | 5389914888541 |
| 14 | 165983936096162 |
| 15 | 5521346346543307 |
| 16 | 197294173392918461 |
| 17 | 7536892461493548226 |
| 18 | 306520422583290179057 |
| 19 | 13222422454704116605057 |
| 20 | 603006160203712090160876 |