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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 8 |
| 8 | 14 |
| 9 | 21 |
| 10 | 39 |
| 11 | 62 |
| 12 | 112 |
| 13 | 189 |
| 14 | 352 |
| 15 | 607 |
| 16 | 1144 |
| 17 | 2055 |
| 18 | 3885 |
| 19 | 7154 |
| 20 | 13602 |
| 21 | 25472 |
| 22 | 48670 |
| 23 | 92204 |
| 24 | 176770 |
| 25 | 337590 |
| 26 | 649341 |
| 27 | 1246840 |
| 28 | 2404872 |
| 29 | 4636389 |
| 30 | 8964143 |
| 31 | 17334800 |
| 32 | 33587072 |
| 33 | 65107998 |
| 34 | 126387975 |
| 35 | 245492232 |
| 36 | 477349348 |
| 37 | 928772649 |
| 38 | 1808669170 |
| 39 | 3524337789 |
| 40 | 6872471442 |