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 | 2 |
| 2 | 8 |
| 3 | 22 |
| 4 | 64 |
| 5 | 162 |
| 6 | 424 |
| 7 | 1022 |
| 8 | 2480 |
| 9 | 5770 |
| 10 | 13336 |
| 11 | 30046 |
| 12 | 67184 |
| 13 | 147554 |
| 14 | 321592 |
| 15 | 692278 |
| 16 | 1479568 |
| 17 | 3133474 |
| 18 | 6596008 |
| 19 | 13788606 |
| 20 | 28679264 |
| 21 | 59335530 |
| 22 | 122256456 |
| 23 | 250875550 |
| 24 | 513116864 |
| 25 | 1046190786 |
| 26 | 2127557592 |
| 27 | 4316282006 |
| 28 | 8739096992 |
| 29 | 17661731138 |
| 30 | 35639764536 |