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) |
|---|---|
| 3 | 1 |
| 4 | 95 |
| 5 | 3107 |
| 6 | 75835 |
| 7 | 1653771 |
| 8 | 34384875 |
| 9 | 700030507 |
| 10 | 14116715435 |
| 11 | 283432939691 |
| 12 | 5679127043755 |
| 13 | 113683003777707 |
| 14 | 2274630646577835 |
| 15 | 45502044971338411 |
| 16 | 910133025632152235 |
| 17 | 18203564201836161707 |
| 18 | 364080180268471397035 |