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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 39 |
| 6 | 163 |
| 7 | 854 |
| 8 | 1017 |
| 9 | 1871 |
| 10 | 4759 |
| 11 | 6630 |
| 12 | 110839 |
| 13 | 117469 |
| 14 | 345777 |
| 15 | 463246 |
| 16 | 809023 |
| 17 | 4508361 |
| 18 | 18842467 |
| 19 | 98720696 |
| 20 | 117563163 |
| 21 | 216283859 |
| 22 | 550130881 |
| 23 | 766414740 |
| 24 | 12812766721 |
| 25 | 13579181461 |
| 26 | 39971129643 |
| 27 | 53550311104 |
| 28 | 93521440747 |
| 29 | 521157514839 |
| 30 | 2178151500103 |