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 | 26 |
| 2 | 676 |
| 3 | 2812 |
| 4 | 11230 |
| 5 | 41112 |
| 6 | 128292 |
| 7 | 388134 |
| 8 | 1134282 |
| 9 | 3225374 |
| 10 | 9002616 |
| 11 | 24769666 |
| 12 | 67483434 |
| 13 | 182349814 |
| 14 | 489763956 |
| 15 | 1309361216 |
| 16 | 3487680090 |
| 17 | 9264546642 |
| 18 | 24556015282 |
| 19 | 64977975688 |
| 20 | 171714994844 |
| 21 | 453323511688 |
| 22 | 1195826552876 |