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 | 4 |
| 4 | 9 |
| 5 | 21 |
| 6 | 50 |
| 7 | 120 |
| 8 | 290 |
| 9 | 704 |
| 10 | 1714 |
| 11 | 4181 |
| 12 | 10212 |
| 13 | 24965 |
| 14 | 61070 |
| 15 | 149458 |
| 16 | 365888 |
| 17 | 895932 |
| 18 | 2194178 |
| 19 | 5374262 |
| 20 | 13164426 |
| 21 | 32248616 |
| 22 | 79002180 |
| 23 | 193544446 |
| 24 | 474168003 |
| 25 | 1161691893 |
| 26 | 2846131055 |
| 27 | 6973047572 |
| 28 | 17084140245 |
| 29 | 41856763371 |
| 30 | 102550935614 |
| 31 | 251254982356 |
| 32 | 615588531011 |
| 33 | 1508227753087 |
| 34 | 3695249380509 |