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 | 128 |
| 2 | 2102 |
| 3 | 15988 |
| 4 | 81606 |
| 5 | 327192 |
| 6 | 1118398 |
| 7 | 3419648 |
| 8 | 9643562 |
| 9 | 25603228 |
| 10 | 64923594 |
| 11 | 158877948 |
| 12 | 378088270 |
| 13 | 879980720 |
| 14 | 2011806182 |
| 15 | 4532900488 |
| 16 | 10091643138 |
| 17 | 22244251284 |
| 18 | 48622120786 |
| 19 | 105526014500 |
| 20 | 227633451206 |
| 21 | 488451508168 |
| 22 | 1043298475662 |
| 23 | 2219419264848 |