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 | 30 |
| 2 | 354 |
| 3 | 4890 |
| 4 | 72354 |
| 5 | 1108650 |
| 6 | 17312754 |
| 7 | 273234810 |
| 8 | 4338079554 |
| 9 | 69107159370 |
| 10 | 1102999460754 |
| 11 | 17623571298330 |
| 12 | 281757423024354 |
| 13 | 4506141560307690 |
| 14 | 72080471098818354 |
| 15 | 1153127396812683450 |
| 16 | 18448597098193370754 |
| 17 | 295164582378232361610 |
| 18 | 4722516577573661689554 |