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 | 252 |
| 2 | 4830 |
| 3 | -16744 |
| 4 | -113643 |
| 5 | 534612 |
| 6 | -577738 |
| 7 | 1217160 |
| 8 | -6905934 |
| 9 | 10661420 |
| 10 | -4219488 |
| 11 | 18643272 |
| 12 | -25499225 |
| 13 | -73279080 |
| 14 | 128406630 |
| 15 | -52843168 |
| 16 | 134722224 |
| 17 | -80873520 |
| 18 | -182213314 |
| 19 | -145589976 |
| 20 | 308120442 |
| 21 | -17125708 |
| 22 | -548895690 |
| 23 | 2687348496 |
| 24 | -1696965207 |
| 25 | -1740295368 |
| 26 | -1596055698 |