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 | 1 |
| 1 | 22 |
| 2 | 297 |
| 3 | 3058 |
| 4 | 26334 |
| 5 | 198748 |
| 6 | 1353275 |
| 7 | 8474202 |
| 8 | 49475074 |
| 9 | 272055454 |
| 10 | 1420063656 |
| 11 | 7079791314 |
| 12 | 33881645721 |
| 13 | 156287683310 |
| 14 | 697257244178 |
| 15 | 3017396237922 |
| 16 | 12697675601127 |
| 17 | 52071958360466 |
| 18 | 208490926189117 |