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 | 3 |
| 3 | 6 |
| 4 | 14 |
| 5 | 36 |
| 6 | 194 |
| 7 | 396309 |
| 8 | 65 |
| 9 | 5340390 |
| 10 | 18448355363 |
| 11 | 1192281639870330 |
| 12 | 180505 |
| 13 | 393869810468558586067193126963349 |
| 14 | 2914872842753 |
| 15 | 2914872842768 |
| 16 | 180026806679 |
| 17 | 4193048661303182427879 |
| 18 | 2640786324 |
| 19 | 11832093582726989 |