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 | 2 |
| 2 | 4 |
| 3 | 30 |
| 4 | 63 |
| 5 | 162 |
| 6 | 629 |
| 7 | 3918 |
| 8 | 5345 |
| 9 | 8577 |
| 10 | 10902 |
| 11 | 12073 |
| 12 | 19001 |
| 13 | 28961 |
| 14 | 33387 |
| 15 | 65964 |
| 16 | 345951 |
| 17 | 1876681 |
| 18 | 2212505 |
| 19 | 9373113 |
| 20 | 11011867 |
| 21 | 12921837 |
| 22 | 14245984 |
| 23 | 63809171 |
| 24 | 96843656 |
| 25 | 111393114 |
| 26 | 340427213 |
| 27 | 536556183 |
| 28 | 768096412 |
| 29 | 1510946116 |
| 30 | 3988447796 |