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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 158 |
| 5 | 1617 |
| 6 | 6211 |
| 7 | 8058 |
| 8 | 16765 |
| 9 | 69093 |
| 10 | 465988 |
| 11 | 5297983 |
| 12 | 6546724 |
| 13 | 18588348 |
| 14 | 38244610 |
| 15 | 204136352 |
| 16 | 430712111 |
| 17 | 2760559191 |
| 18 | 100878516991 |
| 19 | 440393924631 |