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 | 11 |
| 3 | 54 |
| 4 | 136 |
| 5 | 1473 |
| 6 | 3483 |
| 7 | 36244 |
| 8 | 41086 |
| 9 | 305728 |
| 10 | 379955 |
| 11 | 582669 |
| 12 | 4540387 |
| 13 | 5020443 |
| 14 | 22096761 |
| 15 | 24228660 |
| 16 | 48364856 |
| 17 | 178868536 |
| 18 | 234516235 |
| 19 | 524137295 |
| 20 | 1096104266 |
| 21 | 11627672572 |
| 22 | 19828856452 |
| 23 | 31372689367 |
| 24 | 47247829739 |
| 25 | 701124643395 |