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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 28 |
| 6 | 54 |
| 7 | 104 |
| 8 | 198 |
| 9 | 380 |
| 10 | 736 |
| 11 | 1424 |
| 12 | 2756 |
| 13 | 5360 |
| 14 | 10456 |
| 15 | 20416 |
| 16 | 39944 |
| 17 | 78352 |
| 18 | 153952 |
| 19 | 302912 |
| 20 | 596976 |
| 21 | 1178304 |
| 22 | 2328544 |
| 23 | 4606848 |
| 24 | 9124448 |
| 25 | 18089920 |
| 26 | 35895552 |
| 27 | 71283968 |
| 28 | 141664832 |
| 29 | 281718528 |
| 30 | 560561024 |
| 31 | 1115994112 |
| 32 | 2222846080 |
| 33 | 4429381888 |
| 34 | 8829667840 |