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 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 35 |
| 7 | 73 |
| 8 | 161 |
| 9 | 363 |
| 10 | 837 |
| 11 | 1963 |
| 12 | 4721 |
| 13 | 11477 |
| 14 | 28220 |
| 15 | 69692 |
| 16 | 171966 |
| 17 | 421972 |
| 18 | 1025811 |
| 19 | 2462143 |
| 20 | 5821962 |
| 21 | 13540152 |
| 22 | 30942230 |
| 23 | 69443492 |
| 24 | 153038397 |
| 25 | 331208859 |
| 26 | 704147310 |
| 27 | 1471172776 |
| 28 | 3022148872 |
| 29 | 6107363788 |
| 30 | 12148478891 |
| 31 | 23799499067 |
| 32 | 45944968466 |
| 33 | 87452845802 |
| 34 | 164214143935 |