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 | 4 |
| 2 | 110 |
| 3 | 844 |
| 4 | 1720 |
| 5 | 45532 |
| 6 | 363693 |
| 7 | 1129682 |
| 8 | 1136762 |
| 9 | 16354832 |
| 10 | 80822317 |
| 11 | 164740812 |
| 12 | 118019739 |
| 13 | 1269643884 |
| 14 | 4872612379 |
| 15 | 7910355612 |
| 16 | 4617454222 |
| 17 | 41308142036 |
| 18 | 133824389250 |
| 19 | 186755344178 |
| 20 | 94854691897 |
| 21 | 750329582592 |
| 22 | 2169912953058 |