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 | 13 |
| 4 | 34 |
| 5 | 275 |
| 6 | 736 |
| 7 | 6027 |
| 8 | 16148 |
| 9 | 132309 |
| 10 | 354510 |
| 11 | 2904761 |
| 12 | 7783062 |
| 13 | 63772423 |
| 14 | 170872844 |
| 15 | 1400088535 |
| 16 | 3751419496 |
| 17 | 30738175337 |
| 18 | 82360356058 |
| 19 | 674839768869 |
| 20 | 1808176413770 |
| 21 | 14815736739771 |
| 22 | 39697520746872 |
| 23 | 325271368506083 |
| 24 | 871537280017404 |
| 25 | 7141154370394045 |