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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 17 |
| 6 | 19 |
| 7 | 20 |
| 8 | 22 |
| 9 | 23 |
| 10 | 64 |
| 11 | 1055 |
| 12 | 1057 |
| 13 | 6463 |
| 14 | 251708 |
| 15 | 251743 |
| 16 | 251744 |
| 17 | 251755 |
| 18 | 251758 |
| 19 | 27067054 |
| 20 | 27067118 |
| 21 | 27067138 |
| 22 | 69709681 |
| 23 | 69709703 |
| 24 | 69709712 |
| 25 | 145935689366 |
| 26 | 382465573490 |
| 27 | 382465573498 |
| 28 | 6935812012621 |
| 29 | 126979448983610 |
| 30 | 885992692751476 |