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 | 45 |
| 3 | 654 |
| 4 | 5601 |
| 5 | 53995 |
| 6 | 560942 |
| 7 | 5705431 |
| 8 | 57470370 |
| 9 | 581613058 |
| 10 | 5896361722 |
| 11 | 59744304510 |
| 12 | 605287549399 |
| 13 | 6133281385115 |
| 14 | 62150472842382 |
| 15 | 629792949015747 |
| 16 | 6381981797680641 |
| 17 | 64672057071608258 |
| 18 | 655359047486913615 |