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 | 6 |
| 2 | 36 |
| 3 | 158 |
| 4 | 548 |
| 5 | 1600 |
| 6 | 4102 |
| 7 | 9503 |
| 8 | 20299 |
| 9 | 40570 |
| 10 | 76704 |
| 11 | 138348 |
| 12 | 239630 |
| 13 | 400700 |
| 14 | 649642 |
| 15 | 1024813 |
| 16 | 1577669 |
| 17 | 2376142 |
| 18 | 3508636 |
| 19 | 5088714 |
| 20 | 7260552 |
| 21 | 10205240 |
| 22 | 14148014 |
| 23 | 19366507 |
| 24 | 26200111 |
| 25 | 35060546 |
| 26 | 46443736 |
| 27 | 60943096 |
| 28 | 79264338 |