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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 2 |
| 4 | 6 |
| 5 | 13 |
| 6 | 46 |
| 7 | 33 |
| 8 | 246 |
| 9 | 479 |
| 10 | 398 |
| 11 | 883 |
| 12 | 20 |
| 13 | 6215 |
| 14 | 9467 |
| 15 | 16751 |
| 16 | 42245 |
| 17 | 115091 |
| 18 | 140675 |
| 19 | 492363 |
| 20 | 674695 |
| 21 | 1312859 |
| 22 | 2497856 |
| 23 | 2451041 |
| 24 | 4384342 |
| 25 | 6956591 |
| 26 | 24348068 |
| 27 | 118772672 |
| 28 | 147268896 |
| 29 | 112787953 |
| 30 | 394757837 |
| 31 | 844781520 |
| 32 | 809251672 |
| 33 | 2832380853 |
| 34 | 1323398395 |
| 35 | 13221828975 |