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 | 5 |
| 2 | 14 |
| 3 | 44 |
| 4 | 128 |
| 5 | 392 |
| 6 | 1160 |
| 7 | 3512 |
| 8 | 10472 |
| 9 | 31544 |
| 10 | 94376 |
| 11 | 283640 |
| 12 | 849896 |
| 13 | 2551736 |
| 14 | 7651112 |
| 15 | 22961528 |
| 16 | 68868200 |
| 17 | 206637368 |
| 18 | 619846568 |
| 19 | 1859670776 |
| 20 | 5578750184 |
| 21 | 16736774840 |
| 22 | 50209275944 |
| 23 | 150629924984 |
| 24 | 451885580648 |
| 25 | 1355665130552 |