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 | 9 |
| 4 | 54 |
| 5 | 101 |
| 6 | 178 |
| 7 | 189 |
| 8 | 2071 |
| 9 | 3070 |
| 10 | 9171 |
| 11 | 11450 |
| 12 | 12794 |
| 13 | 21405 |
| 14 | 27553 |
| 15 | 35285 |
| 16 | 251974 |
| 17 | 2069863 |
| 18 | 2395894 |
| 19 | 155931488 |
| 20 | 387586437 |
| 21 | 758519827 |
| 22 | 1202435693 |
| 23 | 9859113494 |
| 24 | 42703260442 |