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 | 3 |
| 3 | 10 |
| 4 | 23 |
| 5 | 42 |
| 6 | 97 |
| 7 | 218 |
| 8 | 435 |
| 9 | 918 |
| 10 | 1977 |
| 11 | 4062 |
| 12 | 8393 |
| 13 | 17590 |
| 14 | 36303 |
| 15 | 74614 |
| 16 | 154211 |
| 17 | 317334 |
| 18 | 650505 |
| 19 | 1335054 |
| 20 | 2736453 |
| 21 | 5595950 |
| 22 | 11439475 |
| 23 | 23370270 |
| 24 | 47681965 |
| 25 | 97217882 |
| 26 | 198110199 |
| 27 | 403383026 |
| 28 | 820820215 |
| 29 | 1669405626 |
| 30 | 3393344257 |
| 31 | 6893850650 |
| 32 | 13999109715 |
| 33 | 28414742790 |