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 | 3 |
| 3 | 14 |
| 4 | 96 |
| 5 | 971 |
| 6 | 12015 |
| 7 | 184286 |
| 8 | 3283598 |
| 9 | 67676125 |
| 10 | 1572527901 |
| 11 | 40843114146 |
| 12 | 1170338862814 |
| 13 | 36718016941445 |
| 14 | 1251213685475261 |
| 15 | 46033362584427670 |
| 16 | 1818364700307111794 |
| 17 | 76762441669319061911 |
| 18 | 3448793841153099408185 |
| 19 | 164309637864524321789042 |