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 | 1 |
| 2 | 2 |
| 3 | 14 |
| 4 | 194 |
| 5 | 4114 |
| 6 | 118042 |
| 7 | 4274612 |
| 8 | 186932958 |
| 9 | 9577713250 |
| 10 | 562450162646 |
| 11 | 37232881004442 |
| 12 | 2742420824107648 |
| 13 | 222414345991567630 |
| 14 | 19691735781407563460 |
| 15 | 1889658596054736522248 |
| 16 | 195353325211864635176182 |
| 17 | 21643625444562045727620930 |