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 | 1 |
| 2 | 8 |
| 3 | 99 |
| 4 | 1704 |
| 5 | 37625 |
| 6 | 1014348 |
| 7 | 32300359 |
| 8 | 1186399952 |
| 9 | 49376357109 |
| 10 | 2296400723220 |
| 11 | 118031059900523 |
| 12 | 6643848377509368 |
| 13 | 406471060412884753 |
| 14 | 26856124898028246044 |
| 15 | 1905791887135240982415 |
| 16 | 144563460111417997403040 |
| 17 | 11673024609379676114380877 |
| 18 | 999663240630210837032231460 |