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) |
|---|---|
| 7 | 2 |
| 8 | 172 |
| 9 | 3048 |
| 10 | 33065 |
| 11 | 275641 |
| 12 | 1945529 |
| 13 | 12246616 |
| 14 | 70948683 |
| 15 | 386155045 |
| 16 | 2002805428 |
| 17 | 10000176270 |
| 18 | 48434098918 |
| 19 | 228855387073 |
| 20 | 1059660102823 |
| 21 | 4824874714701 |
| 22 | 21663637862920 |
| 23 | 96134931734425 |
| 24 | 422409581103433 |
| 25 | 1840542075175555 |
| 26 | 7962723214375505 |
| 27 | 34240149114971395 |