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 | 8 |
| 2 | -34 |
| 3 | -1840 |
| 4 | -4724 |
| 5 | 683488 |
| 6 | 7782664 |
| 7 | -339629632 |
| 8 | -8055944560 |
| 9 | 201822075008 |
| 10 | 8719919701984 |
| 11 | -128026275891968 |
| 12 | -10424283645874496 |
| 13 | 67164631281958400 |
| 14 | 13817854415099775104 |
| 15 | 18392961201951276032 |
| 16 | -20165102300581059194624 |
| 17 | -190160981569308074375168 |