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 | 16 |
| 3 | 361 |
| 4 | 9346 |
| 5 | 260710 |
| 6 | 7622290 |
| 7 | 230167345 |
| 8 | 7116228250 |
| 9 | 224012186830 |
| 10 | 7152402830440 |
| 11 | 230999414308090 |
| 12 | 7531444277855740 |
| 13 | 247510726140787240 |
| 14 | 8189274963276187990 |
| 15 | 272537576338530727585 |
| 16 | 9116110475685684958810 |
| 17 | 306286229879232067776310 |