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 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 9 |
| 7 | 18 |
| 8 | 35 |
| 9 | 67 |
| 10 | 129 |
| 11 | 249 |
| 12 | 480 |
| 13 | 925 |
| 14 | 1783 |
| 15 | 3437 |
| 16 | 6625 |
| 17 | 12770 |
| 18 | 24615 |
| 19 | 47447 |
| 20 | 91457 |
| 21 | 176289 |
| 22 | 339808 |
| 23 | 655001 |
| 24 | 1262555 |
| 25 | 2433653 |
| 26 | 4691017 |
| 27 | 9042226 |
| 28 | 17429451 |
| 29 | 33596347 |
| 30 | 64759041 |
| 31 | 124827065 |
| 32 | 240611904 |
| 33 | 463794357 |
| 34 | 893992367 |
| 35 | 1723225693 |