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) |
|---|---|
| 0 | 9 |
| 1 | 37 |
| 2 | 46 |
| 3 | 83 |
| 4 | 378 |
| 5 | 6887 |
| 6 | 27926 |
| 7 | 34813 |
| 8 | 62739 |
| 9 | 285769 |
| 10 | 5206581 |
| 11 | 21112093 |
| 12 | 26318674 |
| 13 | 47430767 |
| 14 | 216041742 |
| 15 | 3936182123 |
| 16 | 15960770234 |
| 17 | 19896952357 |
| 18 | 35857722591 |
| 19 | 163327842721 |
| 20 | 2975758891569 |
| 21 | 12066363408997 |