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 | 5 |
| 4 | 12 |
| 5 | 53 |
| 6 | 118 |
| 7 | 761 |
| 8 | 3162 |
| 9 | 19733 |
| 10 | 82094 |
| 11 | 840673 |
| 12 | 3444786 |
| 13 | 42178105 |
| 14 | 256513416 |
| 15 | 2094285433 |
| 16 | 17010796880 |
| 17 | 274267035513 |
| 18 | 1662613009958 |
| 19 | 30201301214757 |
| 20 | 243273022728014 |
| 21 | 2949477573950925 |
| 22 | 29738048762237264 |
| 23 | 657186550343170733 |
| 24 | 5287230451507603128 |