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 | 2 |
| 2 | 3 |
| 3 | 23 |
| 4 | 14927 |
| 5 | 31049 |
| 6 | 69107 |
| 7 | 246263 |
| 8 | 5860169 |
| 9 | 307164671 |
| 10 | 881198663 |
| 11 | 1489455647 |
| 12 | 2386555631 |
| 13 | 8225563703 |
| 14 | 14311679063 |
| 15 | 111494234183 |
| 16 | 154357775303 |
| 17 | 299004519623 |
| 18 | 870455062823 |
| 19 | 970388922263 |
| 20 | 991817878343 |
| 21 | 1677028870823 |
| 22 | 1782783762503 |
| 23 | 1830446935223 |