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 | 49 |
| 3 | 301 |
| 4 | 1231 |
| 5 | 71522 |
| 6 | 83182 |
| 7 | 174163 |
| 8 | 232352 |
| 9 | 708950 |
| 10 | 1384865 |
| 11 | 2654366 |
| 12 | 9266972 |
| 13 | 13323093 |
| 14 | 27124895 |
| 15 | 54194624 |
| 16 | 184434956 |
| 17 | 284194050 |
| 18 | 435107860 |
| 19 | 483527187 |
| 20 | 537131540 |
| 21 | 1001558168 |
| 22 | 1844029332 |
| 23 | 3702735520 |
| 24 | 6035667328 |
| 25 | 14279899593 |
| 26 | 27476861713 |
| 27 | 39712507475 |
| 28 | 43515769783 |
| 29 | 47671585729 |
| 30 | 62584675312 |