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 | 30 |
| 2 | 990 |
| 3 | 32730 |
| 4 | 1047540 |
| 5 | 33554370 |
| 6 | 1073708010 |
| 7 | 34359738210 |
| 8 | 1099510578960 |
| 9 | 35184372055560 |
| 10 | 1125899873286210 |
| 11 | 36028797018961890 |
| 12 | 1152921503532053580 |
| 13 | 36893488147419095010 |
| 14 | 1180591620683051547810 |
| 15 | 37778931862957128089670 |
| 16 | 1208925819613529663013120 |