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 | 12 |
| 4 | 29 |
| 5 | 61 |
| 6 | 118 |
| 7 | 218 |
| 8 | 395 |
| 9 | 715 |
| 10 | 1308 |
| 11 | 2432 |
| 12 | 4601 |
| 13 | 8841 |
| 14 | 17202 |
| 15 | 33782 |
| 16 | 66775 |
| 17 | 132567 |
| 18 | 263928 |
| 19 | 526396 |
| 20 | 1051045 |
| 21 | 2100021 |
| 22 | 4197614 |
| 23 | 8392402 |
| 24 | 16781539 |
| 25 | 33559331 |
| 26 | 67114388 |
| 27 | 134223928 |
| 28 | 268442385 |
| 29 | 536878625 |
| 30 | 1073750378 |
| 31 | 2147493102 |
| 32 | 4294977711 |
| 33 | 8589946031 |