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 | 1 |
| 2 | 11 |
| 3 | 307 |
| 4 | 29219 |
| 5 | 9874531 |
| 6 | 12425270531 |
| 7 | 60192210392707 |
| 8 | 1137427102035774659 |
| 9 | 84343238614611474677731 |
| 10 | 24650360937055503837110148611 |
| 11 | 28488029177253725394061756995395587 |
| 12 | 130493124785564166325712467713764904289859 |
| 13 | 2373201513573386990964332212910033418138729872611 |