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 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 16 |
| 6 | 34 |
| 7 | 73 |
| 8 | 155 |
| 9 | 324 |
| 10 | 674 |
| 11 | 1393 |
| 12 | 2861 |
| 13 | 5852 |
| 14 | 11929 |
| 15 | 24239 |
| 16 | 49127 |
| 17 | 99360 |
| 18 | 200598 |
| 19 | 404377 |
| 20 | 814135 |
| 21 | 1637363 |
| 22 | 3290067 |
| 23 | 6605980 |
| 24 | 13255451 |
| 25 | 26583994 |
| 26 | 53290694 |
| 27 | 106787166 |
| 28 | 213919062 |
| 29 | 428415074 |
| 30 | 857794856 |
| 31 | 1717201360 |
| 32 | 3437092882 |
| 33 | 6878672565 |
| 34 | 13764822699 |