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 | 14 |
| 5 | 34 |
| 6 | 82 |
| 7 | 198 |
| 8 | 470 |
| 9 | 1122 |
| 10 | 2662 |
| 11 | 6334 |
| 12 | 14970 |
| 13 | 35506 |
| 14 | 83734 |
| 15 | 198086 |
| 16 | 466314 |
| 17 | 1100818 |
| 18 | 2587634 |
| 19 | 6097830 |
| 20 | 14316402 |
| 21 | 33687146 |
| 22 | 79008870 |
| 23 | 185677006 |
| 24 | 435098774 |
| 25 | 1021404998 |
| 26 | 2391646494 |
| 27 | 5609151738 |
| 28 | 13125214770 |
| 29 | 30757286802 |
| 30 | 71928506630 |