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 | 7 |
| 3 | 14 |
| 4 | 37 |
| 5 | 80 |
| 6 | 187 |
| 7 | 410 |
| 8 | 913 |
| 9 | 1988 |
| 10 | 4327 |
| 11 | 9326 |
| 12 | 20029 |
| 13 | 42776 |
| 14 | 91027 |
| 15 | 192962 |
| 16 | 407785 |
| 17 | 859244 |
| 18 | 1805887 |
| 19 | 3786518 |
| 20 | 7922581 |
| 21 | 16544192 |
| 22 | 34486507 |
| 23 | 71769194 |
| 24 | 149130817 |
| 25 | 309446420 |
| 26 | 641262487 |
| 27 | 1327264190 |
| 28 | 2744006893 |
| 29 | 5666970728 |
| 30 | 11691855427 |
| 31 | 24099538706 |
| 32 | 49630733209 |