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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 10 |
| 6 | 21 |
| 7 | 42 |
| 8 | 86 |
| 9 | 174 |
| 10 | 351 |
| 11 | 708 |
| 12 | 1424 |
| 13 | 2861 |
| 14 | 5743 |
| 15 | 11520 |
| 16 | 23092 |
| 17 | 46269 |
| 18 | 92673 |
| 19 | 185562 |
| 20 | 371469 |
| 21 | 743491 |
| 22 | 1487870 |
| 23 | 2977164 |
| 24 | 5956616 |
| 25 | 11916910 |
| 26 | 23839736 |
| 27 | 47688994 |
| 28 | 95393322 |
| 29 | 190811346 |
| 30 | 381662507 |
| 31 | 763389209 |
| 32 | 1526881959 |
| 33 | 3053930971 |
| 34 | 6108131542 |
| 35 | 12216698288 |