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 | 0 |
| 2 | 5 |
| 3 | 1619 |
| 4 | 22861 |
| 5 | 5608661 |
| 6 | 123097943 |
| 7 | 2103004511 |
| 8 | 411605194237 |
| 9 | 29681120620523 |
| 10 | 8356197277826743 |
| 11 | 141511180168198879 |
| 12 | 23016765965614427641 |
| 13 | 30251327028834944270131 |
| 14 | 371385619022538141977254297 |
| 15 | 124784413675757116661951994259 |