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 | 4 |
| 4 | 8 |
| 5 | 13 |
| 6 | 26 |
| 7 | 40 |
| 8 | 80 |
| 9 | 121 |
| 10 | 242 |
| 11 | 364 |
| 12 | 728 |
| 13 | 1093 |
| 14 | 2186 |
| 15 | 3280 |
| 16 | 6560 |
| 17 | 9841 |
| 18 | 19682 |
| 19 | 29524 |
| 20 | 59048 |
| 21 | 88573 |
| 22 | 177146 |
| 23 | 265720 |
| 24 | 531440 |
| 25 | 797161 |
| 26 | 1594322 |
| 27 | 2391484 |
| 28 | 4782968 |
| 29 | 7174453 |
| 30 | 14348906 |
| 31 | 21523360 |
| 32 | 43046720 |
| 33 | 64570081 |
| 34 | 129140162 |
| 35 | 193710244 |
| 36 | 387420488 |
| 37 | 581130733 |