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 | 17 |
| 2 | 47 |
| 3 | -7429 |
| 4 | -160415 |
| 5 | 4464217 |
| 6 | 269993839 |
| 7 | -1892147821 |
| 8 | -489536076223 |
| 9 | -4658915114335 |
| 10 | 987008017069999 |
| 11 | 28053710866880683 |
| 12 | -2150502256703365727 |
| 13 | -118026514721378720791 |
| 14 | 4759029349325350323695 |
| 15 | 480777330814562061542723 |
| 16 | -9102061914203466628786559 |