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 | 26 |
| 3 | 775 |
| 4 | 32516 |
| 5 | 1894429 |
| 6 | 148008446 |
| 7 | 15005570563 |
| 8 | 1920091871816 |
| 9 | 303034557325177 |
| 10 | 57867367557774626 |
| 11 | 13156672434190398271 |
| 12 | 3513034745241511676876 |
| 13 | 1088776741031904909773845 |