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 | 5 |
| 3 | 13 |
| 4 | 29 |
| 5 | 61 |
| 6 | 491 |
| 7 | 3931 |
| 8 | 15727 |
| 9 | 157273 |
| 10 | 314549 |
| 11 | 4403689 |
| 12 | 17614759 |
| 13 | 387524701 |
| 14 | 5425345817 |
| 15 | 119357607977 |
| 16 | 9787323854117 |
| 17 | 78298590832939 |
| 18 | 1722568998324661 |
| 19 | 68902759932986443 |
| 20 | 4685387675443078127 |
| 21 | 318606361930129312639 |
| 22 | 637212723860258625281 |