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 | 7 |
| 3 | 43 |
| 4 | 371 |
| 5 | 3926 |
| 6 | 47622 |
| 7 | 654151 |
| 8 | 9999523 |
| 9 | 167557174 |
| 10 | 3046387103 |
| 11 | 59616689595 |
| 12 | 1247357472869 |
| 13 | 27747682830531 |
| 14 | 653192297754076 |
| 15 | 16206706672425167 |
| 16 | 422358302959175123 |
| 17 | 11526119161103900834 |