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 | 600270 |
| 3 | 621690 |
| 4 | 669990 |
| 5 | 685290 |
| 6 | 693294 |
| 7 | 699810 |
| 8 | 725934 |
| 9 | 774894 |
| 10 | 782598 |
| 11 | 813378 |
| 12 | 823938 |
| 13 | 839802 |
| 14 | 508541124 |
| 15 | 553420812 |
| 16 | 678160756 |
| 17 | 127444892484 |
| 18 | 130213538364 |
| 19 | 131470441284 |
| 20 | 131515433868 |
| 21 | 131523414204 |
| 22 | 131528229924 |
| 23 | 137156770884 |
| 24 | 139602234324 |
| 25 | 140161757484 |