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 | 272 |
| 3 | 3928 |
| 4 | 26948 |
| 5 | 457738 |
| 6 | 12401485 |
| 7 | 240721036 |
| 8 | 3915407831 |
| 9 | 72703138725 |
| 10 | 1459414293797 |
| 11 | 27836081746405 |
| 12 | 518910020345998 |
| 13 | 9822723169066292 |
| 14 | 186833710020397058 |
| 15 | 3546385987603510610 |
| 16 | 67356747007063872600 |