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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 25 |
| 9 | 52 |
| 10 | 112 |
| 11 | 238 |
| 12 | 503 |
| 13 | 1053 |
| 14 | 2194 |
| 15 | 4547 |
| 16 | 9406 |
| 17 | 19401 |
| 18 | 39965 |
| 19 | 82189 |
| 20 | 168837 |
| 21 | 346380 |
| 22 | 709917 |
| 23 | 1453380 |
| 24 | 2972636 |
| 25 | 6074138 |
| 26 | 12400794 |
| 27 | 25295272 |
| 28 | 51556337 |
| 29 | 104998985 |
| 30 | 213681811 |
| 31 | 434548933 |
| 32 | 883104930 |
| 33 | 1793484049 |
| 34 | 3640032699 |
| 35 | 7383188993 |