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 | 1264460 |
| 2 | 2115324 |
| 3 | 2784580 |
| 4 | 7169104 |
| 5 | 18656380 |
| 6 | 28158165 |
| 7 | 81128632 |
| 8 | 174277820 |
| 9 | 498215416 |
| 10 | 1236402232 |
| 11 | 1799281330 |
| 12 | 2387776550 |
| 13 | 2717495235 |
| 14 | 2879697304 |
| 15 | 15837081520 |
| 16 | 17616303220 |
| 17 | 91411869465 |
| 18 | 111375706442 |
| 19 | 661126361272 |
| 20 | 741158497112 |
| 21 | 1045805730255 |
| 22 | 1092162882824 |