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 | 5 |
| 1 | 35 |
| 2 | 245 |
| 3 | 1715 |
| 4 | 12005 |
| 5 | 84035 |
| 6 | 588245 |
| 7 | 4117715 |
| 8 | 28824005 |
| 9 | 201768035 |
| 10 | 1412376245 |
| 11 | 9886633715 |
| 12 | 69206436005 |
| 13 | 484445052035 |
| 14 | 3391115364245 |
| 15 | 23737807549715 |
| 16 | 166164652848005 |
| 17 | 1163152569936035 |
| 18 | 8142067989552245 |
| 19 | 56994475926865715 |