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 | 6 |
| 3 | 10 |
| 4 | 20 |
| 5 | 41 |
| 6 | 84 |
| 7 | 162 |
| 8 | 324 |
| 9 | 637 |
| 10 | 1276 |
| 11 | 2509 |
| 12 | 5018 |
| 13 | 9907 |
| 14 | 19816 |
| 15 | 39202 |
| 16 | 78404 |
| 17 | 155381 |
| 18 | 310764 |
| 19 | 616665 |
| 20 | 1233330 |
| 21 | 2449867 |
| 22 | 4899736 |
| 23 | 9740685 |
| 24 | 19481370 |
| 25 | 38754731 |
| 26 | 77509464 |
| 27 | 154276027 |
| 28 | 308552054 |
| 29 | 614429671 |
| 30 | 1228859344 |
| 31 | 2448023842 |
| 32 | 4896047684 |
| 33 | 9756737701 |
| 34 | 19513475404 |