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 | 114 |
| 3 | 3612 |
| 4 | 80180 |
| 5 | 1374690 |
| 6 | 19234194 |
| 7 | 227605448 |
| 8 | 2335932504 |
| 9 | 21186110970 |
| 10 | 172295622730 |
| 11 | 1271112537684 |
| 12 | 8588601364668 |
| 13 | 53573492643034 |
| 14 | 310601807143530 |
| 15 | 1683493452034320 |
| 16 | 8573748834211984 |
| 17 | 41210997268585158 |
| 18 | 187693442844729174 |
| 19 | 812839595630249540 |