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 | 3 |
| 2 | 7 |
| 3 | 29 |
| 4 | 59 |
| 5 | 239 |
| 6 | 479 |
| 7 | 3833 |
| 8 | 30671 |
| 9 | 61343 |
| 10 | 981493 |
| 11 | 3925973 |
| 12 | 62815573 |
| 13 | 502524587 |
| 14 | 2010098351 |
| 15 | 16080786809 |
| 16 | 1029170355779 |
| 17 | 4116681423119 |
| 18 | 65866902769909 |
| 19 | 263467611079637 |
| 20 | 2107740888637103 |
| 21 | 134895416872774619 |
| 22 | 17266613359715151259 |
| 23 | 1105063255021769680613 |