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 | 61 |
| 3 | 62 |
| 4 | 3781 |
| 5 | 3843 |
| 6 | 234361 |
| 7 | 238204 |
| 8 | 14526601 |
| 9 | 14764805 |
| 10 | 900414901 |
| 11 | 915179706 |
| 12 | 55811197261 |
| 13 | 56726376967 |
| 14 | 3459393815281 |
| 15 | 3516120192248 |
| 16 | 214426605350161 |
| 17 | 217942725542409 |
| 18 | 13290990137894701 |
| 19 | 13508932863437110 |
| 20 | 823826961944121301 |
| 21 | 837335894807558411 |