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 | 3 |
| 2 | 8 |
| 3 | 15 |
| 4 | 33 |
| 5 | 63 |
| 6 | 132 |
| 7 | 260 |
| 8 | 528 |
| 9 | 1057 |
| 10 | 2123 |
| 11 | 4236 |
| 12 | 8464 |
| 13 | 16932 |
| 14 | 33860 |
| 15 | 67732 |
| 16 | 135453 |
| 17 | 270927 |
| 18 | 541836 |
| 19 | 1083716 |
| 20 | 2167408 |
| 21 | 4334796 |
| 22 | 8669604 |
| 23 | 17339208 |
| 24 | 34678448 |
| 25 | 69356872 |
| 26 | 138713720 |
| 27 | 277427448 |
| 28 | 554854896 |
| 29 | 1109709804 |
| 30 | 2219419612 |
| 31 | 4438839324 |
| 32 | 8877678536 |
| 33 | 17755357084 |
| 34 | 35510714180 |
| 35 | 71021428384 |
| 36 | 142042856736 |