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 | 0 |
| 2 | 111 |
| 3 | 2771 |
| 4 | 48980 |
| 5 | 1089035 |
| 6 | 24209608 |
| 7 | 535192095 |
| 8 | 11837195381 |
| 9 | 261930946428 |
| 10 | 5795956434998 |
| 11 | 128249104063760 |
| 12 | 2837819642235388 |
| 13 | 62793689084100491 |
| 14 | 1389463440460469952 |
| 15 | 30745265560214208511 |
| 16 | 680313952713083139457 |