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 | 63 |
| 3 | 322 |
| 4 | 1439 |
| 5 | 5767 |
| 6 | 20972 |
| 7 | 69834 |
| 8 | 214774 |
| 9 | 615120 |
| 10 | 1653047 |
| 11 | 4196501 |
| 12 | 10123619 |
| 13 | 23327383 |
| 14 | 51572441 |
| 15 | 109818385 |
| 16 | 225997932 |
| 17 | 450803519 |
| 18 | 873872396 |
| 19 | 1649976645 |
| 20 | 3040564120 |
| 21 | 5478446820 |
| 22 | 9666837555 |
| 23 | 16728604905 |
| 24 | 28427944695 |
| 25 | 47495149011 |