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 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 41 |
| 6 | 125 |
| 7 | 389 |
| 8 | 1220 |
| 9 | 3829 |
| 10 | 12091 |
| 11 | 38237 |
| 12 | 120869 |
| 13 | 382000 |
| 14 | 1208863 |
| 15 | 3824981 |
| 16 | 12098811 |
| 17 | 38272739 |
| 18 | 121105815 |
| 19 | 383157721 |
| 20 | 1212151630 |
| 21 | 3835001361 |
| 22 | 12133807832 |
| 23 | 38388624860 |
| 24 | 121452176437 |
| 25 | 384255298818 |
| 26 | 1215726271065 |
| 27 | 3846304406380 |
| 28 | 12168956318213 |