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 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 9 |
| 5 | 15 |
| 6 | 27 |
| 7 | 50 |
| 8 | 92 |
| 9 | 171 |
| 10 | 322 |
| 11 | 610 |
| 12 | 1161 |
| 13 | 2220 |
| 14 | 4260 |
| 15 | 8201 |
| 16 | 15828 |
| 17 | 30622 |
| 18 | 59362 |
| 19 | 115287 |
| 20 | 224260 |
| 21 | 436871 |
| 22 | 852161 |
| 23 | 1664196 |
| 24 | 3253531 |
| 25 | 6366973 |
| 26 | 12471056 |
| 27 | 24447507 |
| 28 | 47962236 |
| 29 | 94161474 |
| 30 | 184983976 |
| 31 | 363632192 |
| 32 | 715220838 |
| 33 | 1407510311 |