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 | 2 |
| 1 | 3 |
| 2 | 1 |
| 3 | -9 |
| 4 | -31 |
| 5 | -57 |
| 6 | -47 |
| 7 | 87 |
| 8 | 449 |
| 9 | 999 |
| 10 | 1201 |
| 11 | -393 |
| 12 | -5983 |
| 13 | -16377 |
| 14 | -25199 |
| 15 | -10089 |
| 16 | 70529 |
| 17 | 251943 |
| 18 | 473713 |
| 19 | 413367 |
| 20 | -654751 |
| 21 | -3617721 |
| 22 | -8234159 |
| 23 | -10231593 |
| 24 | 2241857 |
| 25 | 47651943 |
| 26 | 133988401 |
| 27 | 211357431 |
| 28 | 98118689 |
| 29 | -551073657 |
| 30 | -2045695727 |
| 31 | -3932792553 |
| 32 | -3615594751 |