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) |
|---|---|
| 0 | 7 |
| 1 | 12 |
| 2 | 42 |
| 3 | 222 |
| 4 | 1302 |
| 5 | 7782 |
| 6 | 46662 |
| 7 | 279942 |
| 8 | 1679622 |
| 9 | 10077702 |
| 10 | 60466182 |
| 11 | 362797062 |
| 12 | 2176782342 |
| 13 | 13060694022 |
| 14 | 78364164102 |
| 15 | 470184984582 |
| 16 | 2821109907462 |
| 17 | 16926659444742 |
| 18 | 101559956668422 |
| 19 | 609359740010502 |