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 | 31 |
| 3 | 866 |
| 4 | 17740 |
| 5 | 379788 |
| 6 | 8071997 |
| 7 | 170937904 |
| 8 | 3635245483 |
| 9 | 77355342983 |
| 10 | 1645059084851 |
| 11 | 34980781489450 |
| 12 | 743874666203318 |
| 13 | 15818866015610506 |
| 14 | 336395670890580933 |
| 15 | 7153607521601342149 |
| 16 | 152124673570902721461 |