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 | 5 |
| 3 | 10 |
| 4 | 17 |
| 5 | 26 |
| 6 | 65 |
| 7 | 65537 |
| 8 | 146690 |
| 9 | 703922 |
| 10 | 1481090 |
| 11 | 1885130 |
| 12 | 2036330 |
| 13 | 2211170 |
| 14 | 2430482 |
| 15 | 2505890 |
| 16 | 5470922 |
| 17 | 9840770 |
| 18 | 11607650 |
| 19 | 17783090 |
| 20 | 24137570 |
| 21 | 74425130 |
| 22 | 76615010 |
| 23 | 77563250 |
| 24 | 133379402 |
| 25 | 138697730 |
| 26 | 138980522 |
| 27 | 142396490 |
| 28 | 155575730 |
| 29 | 177715562 |
| 30 | 181899170 |