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 | 13 |
| 3 | 119 |
| 4 | 1577 |
| 5 | 3233 |
| 6 | 8867 |
| 7 | 141563 |
| 8 | 2844129 |
| 9 | 28119709 |
| 10 | 335676251 |
| 11 | 3968696491 |
| 12 | 55023970333 |
| 13 | 758025067309 |
| 14 | 799020611041 |
| 15 | 1676892996083 |
| 16 | 59597395635137 |
| 17 | 351844709221043 |
| 18 | 2314823924364859 |
| 19 | 9114392136427625 |
| 20 | 628176680098075 |
| 21 | 216039223801697 |
| 22 | 5117413095318143 |
| 23 | 363066107054194281 |
| 24 | 27957386425926920257 |