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 | 220 |
| 2 | 284 |
| 3 | 280540 |
| 4 | 365084 |
| 5 | 319550 |
| 6 | 430402 |
| 7 | 4532710 |
| 8 | 6135962 |
| 9 | 938304290 |
| 10 | 1344480478 |
| 11 | 14840132450 |
| 12 | 21445545118 |
| 13 | 35049418250 |
| 14 | 54192685558 |
| 15 | 20568863440125 |
| 16 | 32021343142659 |
| 17 | 92371445691525 |
| 18 | 154378742017851 |