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) |
|---|---|
| 0 | 1 |
| 1 | 540 |
| 2 | 75966 |
| 3 | 4701698 |
| 4 | 164489084 |
| 5 | 3764727340 |
| 6 | 61951251333 |
| 7 | 782318812002 |
| 8 | 7946895019096 |
| 9 | 67270102239520 |
| 10 | 487605585591870 |
| 11 | 3092040981805272 |
| 12 | 17451258588313354 |
| 13 | 88902214572208640 |
| 14 | 413569247116248032 |