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 | 31 |
| 3 | 2434 |
| 4 | 17899 |
| 5 | 231921 |
| 6 | 5511367 |
| 7 | 123361724 |
| 8 | 2122878239 |
| 9 | 39737434692 |
| 10 | 798393620079 |
| 11 | 15715764101797 |
| 12 | 301272429965474 |
| 13 | 5838287390984909 |
| 14 | 114058126922015948 |
| 15 | 2220151290688134573 |
| 16 | 43095024081743706131 |