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 | 2 |
| 3 | 6 |
| 4 | 17 |
| 5 | 48 |
| 6 | 135 |
| 7 | 379 |
| 8 | 1063 |
| 9 | 2980 |
| 10 | 8352 |
| 11 | 23405 |
| 12 | 65584 |
| 13 | 183769 |
| 14 | 514919 |
| 15 | 1442785 |
| 16 | 4042614 |
| 17 | 11327182 |
| 18 | 31738101 |
| 19 | 88928244 |
| 20 | 249171491 |
| 21 | 698163131 |
| 22 | 1956209807 |
| 23 | 5481178344 |
| 24 | 15357920824 |
| 25 | 43031938457 |
| 26 | 120572813012 |
| 27 | 337837515853 |
| 28 | 946599685919 |
| 29 | 2652313383105 |