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 | 3 |
| 2 | 7 |
| 3 | 31 |
| 4 | 211 |
| 5 | 2311 |
| 6 | 233311 |
| 7 | 30563611 |
| 8 | 4615105111 |
| 9 | 835334024911 |
| 10 | 159548798757811 |
| 11 | 49938774011194531 |
| 12 | 17628387225951669091 |
| 13 | 6575388435279972570571 |
| 14 | 2518373770712229494528311 |
| 15 | 1830857731307790842522081371 |
| 16 | 1385959302599997667789215597091 |