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 | 4 |
| 2 | 97 |
| 3 | 392 |
| 4 | 9505 |
| 5 | 38412 |
| 6 | 931393 |
| 7 | 3763984 |
| 8 | 91267009 |
| 9 | 368832020 |
| 10 | 8943235489 |
| 11 | 36141773976 |
| 12 | 876345810913 |
| 13 | 3541525017628 |
| 14 | 85872946233985 |
| 15 | 347033309953568 |
| 16 | 8414672385119617 |
| 17 | 34005722850432036 |
| 18 | 824552020795488481 |