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 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 24 |
| 6 | 51 |
| 7 | 109 |
| 8 | 234 |
| 9 | 503 |
| 10 | 1081 |
| 11 | 2322 |
| 12 | 4987 |
| 13 | 10711 |
| 14 | 23006 |
| 15 | 49415 |
| 16 | 106139 |
| 17 | 227976 |
| 18 | 489669 |
| 19 | 1051759 |
| 20 | 2259072 |
| 21 | 4852259 |
| 22 | 10422163 |
| 23 | 22385754 |
| 24 | 48082339 |
| 25 | 103276009 |
| 26 | 221826440 |
| 27 | 476460797 |
| 28 | 1023389687 |
| 29 | 2198137722 |
| 30 | 4721377893 |
| 31 | 10141043023 |
| 32 | 21781936530 |