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 | 5 |
| 3 | 82 |
| 4 | 1421 |
| 5 | 29626 |
| 6 | 657662 |
| 7 | 15528640 |
| 8 | 381137549 |
| 9 | 9656742322 |
| 10 | 250689517130 |
| 11 | 6638957500924 |
| 12 | 178721359853390 |
| 13 | 4878005765458528 |
| 14 | 134712060315562784 |
| 15 | 3758101325718600832 |
| 16 | 105769714118196065933 |
| 17 | 3000003700599260555650 |
| 18 | 85677293959381174518986 |