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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 61 |
| 6 | 91 |
| 7 | 1105 |
| 8 | 1695 |
| 9 | 26281 |
| 10 | 40951 |
| 11 | 771561 |
| 12 | 1214423 |
| 13 | 26916709 |
| 14 | 42664987 |
| 15 | 1087101569 |
| 16 | 1732076671 |
| 17 | 49868399761 |
| 18 | 79771413871 |
| 19 | 2560599031177 |
| 20 | 4108933742199 |
| 21 | 145477500542221 |
| 22 | 234040800869107 |
| 23 | 9059621800971105 |
| 24 | 14605723004036255 |
| 25 | 613627780919407801 |