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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 18 |
| 7 | 37 |
| 8 | 96 |
| 9 | 239 |
| 10 | 658 |
| 11 | 1810 |
| 12 | 5358 |
| 13 | 16057 |
| 14 | 50373 |
| 15 | 161811 |
| 16 | 536964 |
| 17 | 1826151 |
| 18 | 6380481 |
| 19 | 22822280 |
| 20 | 83587920 |
| 21 | 312954111 |
| 22 | 1197178941 |
| 23 | 4674642341 |
| 24 | 18620255306 |
| 25 | 75606404857 |
| 26 | 312763294254 |
| 27 | 1317356836235 |
| 28 | 5646694922172 |
| 29 | 24618969819915 |
| 30 | 109125629486233 |
| 31 | 491554330852608 |