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 | 13 |
| 3 | 355 |
| 4 | 16333 |
| 5 | 1121881 |
| 6 | 106708921 |
| 7 | 13354028563 |
| 8 | 2118817455385 |
| 9 | 414426460442833 |
| 10 | 97746679844312581 |
| 11 | 27311169061720393411 |
| 12 | 8908525371578726747173 |
| 13 | 3350963996380181114090665 |
| 14 | 1438463413778071631322236593 |
| 15 | 698374517715612292764726380851 |