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 | 36 |
| 2 | 665 |
| 3 | 8400 |
| 4 | 81584 |
| 5 | 649536 |
| 6 | 4413471 |
| 7 | 26311884 |
| 8 | 140429874 |
| 9 | 681294172 |
| 10 | 3040682386 |
| 11 | 12604874396 |
| 12 | 48916205718 |
| 13 | 178878544028 |
| 14 | 619807366651 |
| 15 | 2044561200672 |
| 16 | 6447023494362 |
| 17 | 19501857519768 |
| 18 | 56767942666603 |