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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 28 |
| 6 | 62 |
| 7 | 134 |
| 8 | 285 |
| 9 | 610 |
| 10 | 1277 |
| 11 | 2661 |
| 12 | 5506 |
| 13 | 11305 |
| 14 | 23064 |
| 15 | 46803 |
| 16 | 94406 |
| 17 | 189484 |
| 18 | 378522 |
| 19 | 752668 |
| 20 | 1490319 |
| 21 | 2939093 |
| 22 | 5774065 |
| 23 | 11302564 |
| 24 | 22048496 |
| 25 | 42869613 |
| 26 | 83091843 |
| 27 | 160569590 |
| 28 | 309398958 |
| 29 | 594532990 |
| 30 | 1139416396 |
| 31 | 2178119059 |
| 32 | 4153507514 |
| 33 | 7901706341 |