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 | 2 |
| 2 | 8 |
| 3 | 26 |
| 4 | 108 |
| 5 | 382 |
| 6 | 1586 |
| 7 | 5812 |
| 8 | 24044 |
| 9 | 89846 |
| 10 | 370398 |
| 11 | 1401292 |
| 12 | 5759826 |
| 13 | 21977516 |
| 14 | 90111820 |
| 15 | 345994216 |
| 16 | 1415691244 |
| 17 | 5461770406 |
| 18 | 22308412934 |
| 19 | 86392108636 |
| 20 | 352334866238 |
| 21 | 1368640564996 |
| 22 | 5574504569620 |
| 23 | 21708901408216 |
| 24 | 88320660937298 |
| 25 | 344680279929532 |
| 26 | 1400902293406676 |