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) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 12 |
| 5 | 20 |
| 6 | 34 |
| 7 | 74 |
| 8 | 131 |
| 9 | 260 |
| 10 | 524 |
| 11 | 1030 |
| 12 | 2054 |
| 13 | 4118 |
| 14 | 8196 |
| 15 | 16389 |
| 16 | 32804 |
| 17 | 65554 |
| 18 | 131074 |
| 19 | 262216 |
| 20 | 524292 |
| 21 | 1048580 |
| 22 | 2097304 |
| 23 | 4194312 |
| 24 | 8388619 |
| 25 | 16777478 |
| 26 | 33554436 |
| 27 | 67108906 |
| 28 | 134218244 |
| 29 | 268435464 |
| 30 | 536870914 |
| 31 | 1073742880 |
| 32 | 2147483720 |
| 33 | 4294967300 |
| 34 | 8589936646 |
| 35 | 17179869193 |