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 | 10 |
| 2 | 100 |
| 3 | 358 |
| 4 | 1307 |
| 5 | 5458 |
| 6 | 19909 |
| 7 | 68807 |
| 8 | 243954 |
| 9 | 851870 |
| 10 | 2913994 |
| 11 | 9973355 |
| 12 | 34091714 |
| 13 | 115887871 |
| 14 | 393267367 |
| 15 | 1334118596 |
| 16 | 4519810862 |
| 17 | 15299142694 |
| 18 | 51772884227 |
| 19 | 175141804206 |
| 20 | 592296849671 |
| 21 | 2002747670245 |
| 22 | 6771221110994 |
| 23 | 22890878459054 |