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 | 3 |
| 3 | 6 |
| 4 | 12 |
| 5 | 21 |
| 6 | 42 |
| 7 | 84 |
| 8 | 155 |
| 9 | 310 |
| 10 | 620 |
| 11 | 1176 |
| 12 | 2352 |
| 13 | 4704 |
| 14 | 9071 |
| 15 | 18142 |
| 16 | 36284 |
| 17 | 70717 |
| 18 | 141434 |
| 19 | 282868 |
| 20 | 555268 |
| 21 | 1110536 |
| 22 | 2221072 |
| 23 | 4381656 |
| 24 | 8763312 |
| 25 | 17526624 |
| 26 | 34697879 |
| 27 | 69395758 |
| 28 | 138791516 |
| 29 | 275467455 |
| 30 | 550934910 |
| 31 | 1101869820 |
| 32 | 2191008499 |