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 | 26 |
| 2 | 676 |
| 3 | 15390 |
| 4 | 347502 |
| 5 | 7791488 |
| 6 | 174545777 |
| 7 | 3908531208 |
| 8 | 87515884741 |
| 9 | 1959513380192 |
| 10 | 43873997112932 |
| 11 | 982347997376840 |
| 12 | 21994968695108692 |
| 13 | 492471697249839464 |
| 14 | 11026538323840183371 |
| 15 | 246886363177103814747 |