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 | 46 |
| 3 | 207 |
| 4 | 14652 |
| 5 | 66493 |
| 6 | 4717738 |
| 7 | 21410379 |
| 8 | 1519096824 |
| 9 | 6894075385 |
| 10 | 489144459430 |
| 11 | 2219870863431 |
| 12 | 157502996839476 |
| 13 | 714791523949237 |
| 14 | 50715475837851682 |
| 15 | 230160650840790723 |
| 16 | 16330225716791401968 |
| 17 | 74111014779210663409 |
| 18 | 5258281965330993581854 |