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) |
|---|---|
| 1 | 1 |
| 2 | -17 |
| 3 | 80 |
| 4 | -240 |
| 5 | 624 |
| 6 | -1360 |
| 7 | 2400 |
| 8 | -3840 |
| 9 | 6480 |
| 10 | -10608 |
| 11 | 14640 |
| 12 | -19200 |
| 13 | 28560 |
| 14 | -40800 |
| 15 | 49920 |
| 16 | -61440 |
| 17 | 83520 |
| 18 | -110160 |
| 19 | 130320 |
| 20 | -149760 |
| 21 | 192000 |
| 22 | -248880 |
| 23 | 279840 |
| 24 | -307200 |
| 25 | 390000 |
| 26 | -485520 |
| 27 | 524880 |
| 28 | -576000 |
| 29 | 707280 |
| 30 | -848640 |
| 31 | 923520 |
| 32 | -983040 |
| 33 | 1171200 |
| 34 | -1419840 |
| 35 | 1497600 |
| 36 | -1555200 |