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 | 26 |
| 3 | 627 |
| 4 | 15052 |
| 5 | 361253 |
| 6 | 8670078 |
| 7 | 208081879 |
| 8 | 4993965104 |
| 9 | 119855162505 |
| 10 | 2876523900130 |
| 11 | 69036573603131 |
| 12 | 1656877766475156 |
| 13 | 39765066395403757 |
| 14 | 954361593489690182 |
| 15 | 22904678243752564383 |
| 16 | 549712277850061545208 |
| 17 | 13193094668401477085009 |
| 18 | 316634272041635450040234 |