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 | 3 |
| 3 | 12 |
| 4 | 21 |
| 5 | 51 |
| 6 | 57 |
| 7 | 73 |
| 8 | 85 |
| 9 | 96 |
| 10 | 1388 |
| 11 | 4117 |
| 12 | 5268 |
| 13 | 9842 |
| 14 | 11850 |
| 15 | 16192 |
| 16 | 19667 |
| 17 | 29713 |
| 18 | 76283 |
| 19 | 460550 |
| 20 | 1333597 |
| 21 | 1462506 |
| 22 | 9400189 |
| 23 | 13097390 |
| 24 | 30254851 |
| 25 | 190193800 |
| 26 | 201892756 |
| 27 | 431766247 |
| 28 | 942050077 |
| 29 | 6204785761 |
| 30 | 16684400052 |
| 31 | 23762490104 |