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 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 27 |
| 5 | 51 |
| 6 | 95 |
| 7 | 179 |
| 8 | 340 |
| 9 | 649 |
| 10 | 1243 |
| 11 | 2407 |
| 12 | 4691 |
| 13 | 9175 |
| 14 | 17982 |
| 15 | 35287 |
| 16 | 69588 |
| 17 | 137596 |
| 18 | 272448 |
| 19 | 539868 |
| 20 | 1070224 |
| 21 | 2122129 |
| 22 | 4217132 |
| 23 | 8389833 |
| 24 | 16700934 |
| 25 | 33255128 |
| 26 | 66228664 |
| 27 | 131908316 |