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 | 0 |
| 2 | 6 |
| 3 | 15 |
| 4 | 39 |
| 5 | 84 |
| 6 | 174 |
| 7 | 342 |
| 8 | 654 |
| 9 | 1221 |
| 10 | 2241 |
| 11 | 4056 |
| 12 | 7260 |
| 13 | 12876 |
| 14 | 22662 |
| 15 | 39627 |
| 16 | 68907 |
| 17 | 119244 |
| 18 | 205482 |
| 19 | 352770 |
| 20 | 603630 |
| 21 | 1029825 |
| 22 | 1752261 |
| 23 | 2974320 |
| 24 | 5037624 |
| 25 | 8515224 |
| 26 | 14367174 |
| 27 | 24200007 |
| 28 | 40699119 |
| 29 | 68348676 |
| 30 | 114629286 |
| 31 | 192009006 |
| 32 | 321250830 |
| 33 | 536903421 |
| 34 | 896410377 |