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 | 199 |
| 3 | 39602 |
| 4 | 7880997 |
| 5 | 1568358005 |
| 6 | 312111123992 |
| 7 | 62111682032413 |
| 8 | 12360536835574179 |
| 9 | 2459808941961294034 |
| 10 | 489514339987133086945 |
| 11 | 97415813466381445596089 |
| 12 | 19386236394149894806708656 |
| 13 | 3857958458249295447980618633 |
| 14 | 767753119428003944042949816623 |