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 | 10 |
| 3 | 65 |
| 4 | 2411 |
| 5 | 7777 |
| 6 | 2986058 |
| 7 | 2097153 |
| 8 | 2562893036 |
| 9 | 10604499438 |
| 10 | 3570467234410 |
| 11 | 743008370689 |
| 12 | 232218265092200875 |
| 13 | 793714773254145 |
| 14 | 21035720123170684938 |
| 15 | 504857282956046114465 |
| 16 | 727423121747187826721517 |
| 17 | 2185911559738696531969 |
| 18 | 43567528752021332763809905512 |
| 19 | 5242880000000000000000001 |