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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 10 |
| 5 | 19 |
| 6 | 64 |
| 7 | 1471 |
| 8 | 3161 |
| 9 | 3028 |
| 10 | 6397 |
| 11 | 27956 |
| 12 | 58307 |
| 13 | 168652 |
| 14 | 190031 |
| 15 | 794076401 |
| 16 | 817191437 |
| 17 | 57056556523 |
| 18 | 65776878541 |
| 19 | 112508501827291 |
| 20 | 32836043478431 |
| 21 | 24620974441660973 |
| 22 | 30663050241335933 |
| 23 | 280904716386831931 |
| 24 | 1713934856212591039 |
| 25 | 12438570098319186469 |