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) |
|---|---|
| 3 | 22 |
| 4 | 53 |
| 5 | 146 |
| 6 | 338 |
| 7 | 995 |
| 8 | 2661 |
| 9 | 6961 |
| 10 | 18770 |
| 11 | 50161 |
| 12 | 134426 |
| 13 | 359126 |
| 14 | 960419 |
| 15 | 2570837 |
| 16 | 6875493 |
| 17 | 18392182 |
| 18 | 49200125 |
| 19 | 131613970 |
| 20 | 352077098 |
| 21 | 941809667 |
| 22 | 2519398997 |
| 23 | 6739522745 |
| 24 | 18028532346 |
| 25 | 48227208121 |
| 26 | 129010104410 |
| 27 | 345108392014 |
| 28 | 923181669827 |
| 29 | 2469555755813 |