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) |
|---|---|
| 0 | 1048575 |
| 1 | 1072694271 |
| 2 | 33318534175 |
| 3 | 243847503074 |
| 4 | 864541650285 |
| 5 | 3339558541092 |
| 6 | 5850069838187 |
| 7 | 26430563206584 |
| 8 | 105631975698549 |
| 9 | 422325561509199 |
| 10 | 747943132188453 |
| 11 | 3386887960290176 |
| 12 | 13547120512852878 |