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 | 2188 |
| 3 | 78126 |
| 4 | 823544 |
| 5 | 4785157 |
| 6 | 19487172 |
| 7 | 62748518 |
| 8 | 170939688 |
| 9 | 410338674 |
| 10 | 893871740 |
| 11 | 1801914272 |
| 12 | 3404825448 |
| 13 | 6103593751 |
| 14 | 10465138360 |
| 15 | 17249876310 |
| 16 | 27512614112 |
| 17 | 42637932336 |
| 18 | 64340198544 |
| 19 | 94931877134 |
| 20 | 137293757384 |
| 21 | 194754273882 |
| 22 | 271818611108 |
| 23 | 373845175782 |