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 | 2 |
| 2 | 7 |
| 3 | 13 |
| 4 | 19 |
| 5 | 85 |
| 6 | 2601 |
| 7 | 9602 |
| 8 | 46268 |
| 9 | 4812284 |
| 10 | 147961485 |
| 11 | 210810243 |
| 12 | 814960948 |
| 13 | 1003849128 |
| 14 | 1016803038 |
| 15 | 12917183059 |
| 16 | 26242325020 |
| 17 | 22215291139324 |
| 18 | 30797877759859 |
| 19 | 60139200644343 |
| 20 | 121848657453426 |
| 21 | 133555928335475 |