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) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 9 |
| 6 | 16 |
| 7 | 31 |
| 8 | 54 |
| 9 | 94 |
| 10 | 175 |
| 11 | 317 |
| 12 | 600 |
| 13 | 1097 |
| 14 | 2076 |
| 15 | 3860 |
| 16 | 7252 |
| 17 | 13727 |
| 18 | 25954 |
| 19 | 49323 |
| 20 | 93935 |
| 21 | 179319 |
| 22 | 342888 |
| 23 | 657129 |
| 24 | 1261489 |
| 25 | 2425630 |
| 26 | 4671296 |