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 | 126 |
| 2 | 138 |
| 3 | 570 |
| 4 | 765 |
| 5 | 41958 |
| 6 | 42966 |
| 7 | 57333 |
| 8 | 2788950 |
| 9 | 3489705 |
| 10 | 3833685 |
| 11 | 178846038 |
| 12 | 240385701 |
| 13 | 245890389 |
| 14 | 11451491670 |
| 15 | 15657335445 |
| 16 | 15745414485 |
| 17 | 732979762518 |
| 18 | 1006431627861 |
| 19 | 1007840908629 |
| 20 | 46912048616790 |
| 21 | 64481417734485 |