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 | 6 |
| 2 | 36 |
| 3 | 102 |
| 4 | 287 |
| 5 | 882 |
| 6 | 2491 |
| 7 | 6759 |
| 8 | 18528 |
| 9 | 50244 |
| 10 | 134284 |
| 11 | 357919 |
| 12 | 951428 |
| 13 | 2517507 |
| 14 | 6644999 |
| 15 | 17514496 |
| 16 | 46087746 |
| 17 | 121122382 |
| 18 | 318060011 |
| 19 | 834615854 |
| 20 | 2188807497 |
| 21 | 5737757291 |
| 22 | 15035923244 |
| 23 | 39391026514 |
| 24 | 103174230894 |
| 25 | 270192214787 |