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 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 32 |
| 5 | 101 |
| 6 | 315 |
| 7 | 975 |
| 8 | 3001 |
| 9 | 9199 |
| 10 | 28109 |
| 11 | 85680 |
| 12 | 260650 |
| 13 | 791663 |
| 14 | 2401313 |
| 15 | 7275738 |
| 16 | 22024152 |
| 17 | 66615351 |
| 18 | 201349365 |
| 19 | 608227698 |
| 20 | 1836345996 |
| 21 | 5541690723 |
| 22 | 16716767709 |
| 23 | 50408518791 |
| 24 | 151954553565 |
| 25 | 457926628077 |
| 26 | 1379630558935 |
| 27 | 4155518092780 |
| 28 | 12513892232666 |
| 29 | 37676692203405 |