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 | 10 |
| 3 | 32 |
| 4 | 103 |
| 5 | 331 |
| 6 | 1064 |
| 7 | 3420 |
| 8 | 10993 |
| 9 | 35335 |
| 10 | 113578 |
| 11 | 365076 |
| 12 | 1173471 |
| 13 | 3771911 |
| 14 | 12124128 |
| 15 | 38970824 |
| 16 | 125264689 |
| 17 | 402640763 |
| 18 | 1294216154 |
| 19 | 4160024536 |
| 20 | 13371648999 |
| 21 | 42980755379 |
| 22 | 138153890600 |
| 23 | 444070778180 |
| 24 | 1427385469761 |
| 25 | 4588073296863 |
| 26 | 14747534582170 |