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 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 12 |
| 5 | 19 |
| 6 | 29 |
| 7 | 40 |
| 8 | 787 |
| 9 | 1679 |
| 10 | 2137 |
| 11 | 2508 |
| 12 | 2728 |
| 13 | 5016 |
| 14 | 7524 |
| 15 | 12773 |
| 16 | 36183 |
| 17 | 46116 |
| 18 | 192952 |
| 19 | 246916 |
| 20 | 681538 |
| 21 | 1316065 |
| 22 | 4826672 |
| 23 | 7571204 |
| 24 | 8709926 |
| 25 | 9716827 |
| 26 | 24922317 |