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 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 16 |
| 7 | 31 |
| 8 | 62 |
| 9 | 129 |
| 10 | 279 |
| 11 | 621 |
| 12 | 1421 |
| 13 | 3343 |
| 14 | 8057 |
| 15 | 19870 |
| 16 | 50071 |
| 17 | 128747 |
| 18 | 337414 |
| 19 | 900358 |
| 20 | 2443947 |
| 21 | 6742667 |
| 22 | 18893218 |
| 23 | 53729800 |
| 24 | 154983562 |
| 25 | 453174686 |
| 26 | 1342528227 |
| 27 | 4027584682 |
| 28 | 12230119228 |
| 29 | 37574801086 |
| 30 | 116753643340 |
| 31 | 366767636286 |
| 32 | 1164414663338 |
| 33 | 3734900007009 |