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 | 2 |
| 3 | 7 |
| 4 | 9 |
| 5 | 18 |
| 6 | 39 |
| 7 | 54 |
| 8 | 83 |
| 9 | 133 |
| 10 | 268 |
| 11 | 337 |
| 12 | 542 |
| 13 | 754 |
| 14 | 1148 |
| 15 | 2058 |
| 16 | 2689 |
| 17 | 3909 |
| 18 | 5607 |
| 19 | 7945 |
| 20 | 10965 |
| 21 | 19024 |
| 22 | 23838 |
| 23 | 34840 |
| 24 | 47332 |
| 25 | 67121 |
| 26 | 89006 |
| 27 | 125571 |
| 28 | 194513 |
| 29 | 250634 |
| 30 | 349001 |
| 31 | 473018 |
| 32 | 644107 |
| 33 | 860595 |
| 34 | 1164018 |
| 35 | 1532321 |
| 36 | 2327654 |
| 37 | 2923772 |
| 38 | 4022746 |
| 39 | 5290310 |
| 40 | 7188111 |