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 | -1 |
| 2 | -5 |
| 3 | -9 |
| 4 | -6 |
| 5 | 35 |
| 6 | 125 |
| 7 | 275 |
| 8 | 291 |
| 9 | -241 |
| 10 | -2111 |
| 11 | -5989 |
| 12 | -10990 |
| 13 | -11660 |
| 14 | 6454 |
| 15 | 68298 |
| 16 | 201859 |
| 17 | 400794 |
| 18 | 546122 |
| 19 | 269907 |
| 20 | -1175825 |
| 21 | -4890783 |
| 22 | -11746437 |
| 23 | -20668698 |
| 24 | -25146121 |
| 25 | -7959643 |
| 26 | 63707489 |
| 27 | 236244458 |
| 28 | 546634684 |
| 29 | 956731805 |
| 30 | 1220119643 |
| 31 | 676723572 |
| 32 | -1964409479 |
| 33 | -8645307595 |