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 | 4 |
| 4 | 5 |
| 5 | 11 |
| 6 | 26 |
| 7 | 52 |
| 8 | 92 |
| 9 | 198 |
| 10 | 249 |
| 11 | 560 |
| 12 | 1311 |
| 13 | 2776 |
| 14 | 6367 |
| 15 | 14086 |
| 16 | 21007 |
| 17 | 48034 |
| 18 | 56031 |
| 19 | 131781 |
| 20 | 317515 |
| 21 | 695541 |
| 22 | 804219 |
| 23 | 2011535 |
| 24 | 4555083 |
| 25 | 8040378 |
| 26 | 18688105 |
| 27 | 25235398 |
| 28 | 59995537 |
| 29 | 68141074 |
| 30 | 165243129 |
| 31 | 407951724 |
| 32 | 927908528 |