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 | 256 |
| 2 | 10000 |
| 3 | 86701 |
| 4 | 497958 |
| 5 | 2332222 |
| 6 | 9331553 |
| 7 | 32806574 |
| 8 | 103452812 |
| 9 | 297410156 |
| 10 | 789731500 |
| 11 | 1957606141 |
| 12 | 4569537752 |
| 13 | 10116846904 |
| 14 | 21372349639 |
| 15 | 43300242010 |
| 16 | 84493906854 |
| 17 | 159387825448 |
| 18 | 291579791772 |
| 19 | 518714491591 |
| 20 | 899524090772 |