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 | 5 |
| 2 | 226 |
| 3 | 3157 |
| 4 | 15023 |
| 5 | 27000 |
| 6 | 752271 |
| 7 | 8434277 |
| 8 | 39361323 |
| 9 | 80878071 |
| 10 | 64001290 |
| 11 | 1061617971 |
| 12 | 6885026630 |
| 13 | 20690808333 |
| 14 | 29111264965 |
| 15 | 15934951732 |
| 16 | 200246707818 |
| 17 | 986856290325 |
| 18 | 2324162438865 |
| 19 | 2632647531203 |
| 20 | 1170193845706 |
| 21 | 12359035000524 |