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 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 12 |
| 5 | 26 |
| 6 | 51 |
| 7 | 97 |
| 8 | 193 |
| 9 | 380 |
| 10 | 741 |
| 11 | 1456 |
| 12 | 2860 |
| 13 | 5605 |
| 14 | 10997 |
| 15 | 21581 |
| 16 | 42332 |
| 17 | 83047 |
| 18 | 162936 |
| 19 | 319650 |
| 20 | 627099 |
| 21 | 1230289 |
| 22 | 2413641 |
| 23 | 4735192 |
| 24 | 9289761 |
| 25 | 18225136 |
| 26 | 35754992 |
| 27 | 70146009 |
| 28 | 137616081 |
| 29 | 269982313 |
| 30 | 529665276 |
| 31 | 1039124759 |
| 32 | 2038608652 |
| 33 | 3999447882 |