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 | 4 |
| 2 | 10 |
| 3 | 22 |
| 4 | 44 |
| 5 | 84 |
| 6 | 155 |
| 7 | 278 |
| 8 | 490 |
| 9 | 850 |
| 10 | 1457 |
| 11 | 2474 |
| 12 | 4167 |
| 13 | 6974 |
| 14 | 11609 |
| 15 | 19238 |
| 16 | 31762 |
| 17 | 52274 |
| 18 | 85806 |
| 19 | 140534 |
| 20 | 229735 |
| 21 | 374958 |
| 22 | 611158 |
| 23 | 995016 |
| 24 | 1618409 |
| 25 | 2630222 |
| 26 | 4271663 |
| 27 | 6933430 |
| 28 | 11248251 |
| 29 | 18240668 |
| 30 | 29569464 |
| 31 | 47920016 |
| 32 | 77639264 |
| 33 | 125763290 |
| 34 | 203680213 |
| 35 | 329821130 |
| 36 | 534014584 |