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 | 3 |
| 2 | 11 |
| 3 | 32 |
| 4 | 92 |
| 5 | 239 |
| 6 | 608 |
| 7 | 1465 |
| 8 | 3450 |
| 9 | 7858 |
| 10 | 17525 |
| 11 | 38165 |
| 12 | 81653 |
| 13 | 171497 |
| 14 | 354785 |
| 15 | 723084 |
| 16 | 1454642 |
| 17 | 2889854 |
| 18 | 5676607 |
| 19 | 11031046 |
| 20 | 21224439 |
| 21 | 40453596 |
| 22 | 76428636 |
| 23 | 143192339 |
| 24 | 266172016 |
| 25 | 491072611 |
| 26 | 899583306 |
| 27 | 1636775949 |
| 28 | 2958900040 |
| 29 | 5316004485 |
| 30 | 9494514599 |