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 | 2 |
| 2 | 5 |
| 3 | 31 |
| 4 | 276 |
| 5 | 3111 |
| 6 | 42143 |
| 7 | 666128 |
| 8 | 12033346 |
| 9 | 244550149 |
| 10 | 5522134317 |
| 11 | 137163540306 |
| 12 | 3716712490472 |
| 13 | 109104171183047 |
| 14 | 3449120959632091 |
| 15 | 116825788063473052 |
| 16 | 4220828797872750510 |
| 17 | 162026366682646437513 |