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 | 16 |
| 5 | 32 |
| 6 | 64 |
| 7 | 128 |
| 8 | 255 |
| 9 | 507 |
| 10 | 1007 |
| 11 | 1999 |
| 12 | 3967 |
| 13 | 7871 |
| 14 | 15615 |
| 15 | 30976 |
| 16 | 61446 |
| 17 | 121886 |
| 18 | 241774 |
| 19 | 479582 |
| 20 | 951294 |
| 21 | 1886974 |
| 22 | 3742973 |
| 23 | 7424501 |
| 24 | 14727117 |
| 25 | 29212461 |
| 26 | 57945341 |
| 27 | 114939389 |
| 28 | 227991805 |
| 29 | 452240638 |
| 30 | 897056776 |
| 31 | 1779386436 |
| 32 | 3529560412 |
| 33 | 7001175484 |