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 | 13 |
| 2 | 1681 |
| 3 | 112485 |
| 4 | 9049169 |
| 5 | 692276437 |
| 6 | 53786626921 |
| 7 | 4161756233501 |
| 8 | 322462050747008 |
| 9 | 24976513162427653 |
| 10 | 1934824269280528177 |
| 11 | 149878484960033943221 |
| 12 | 11610280860482785441201 |
| 13 | 899384302182455890904869 |
| 14 | 69670430204782040731619473 |
| 15 | 5396990358379369075151309301 |