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 | 16 |
| 3 | 162 |
| 4 | 1345 |
| 5 | 10096 |
| 6 | 72028 |
| 7 | 503295 |
| 8 | 3513522 |
| 9 | 24846186 |
| 10 | 179710415 |
| 11 | 1338211110 |
| 12 | 10301168792 |
| 13 | 82149009153 |
| 14 | 679213429092 |
| 15 | 5821288827862 |
| 16 | 51678344988737 |
| 17 | 474686563694500 |
| 18 | 4505982729646896 |
| 19 | 44149073821979791 |
| 20 | 445947141166581374 |
| 21 | 4638543419725492302 |
| 22 | 49631058873617505287 |