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 | -5 |
| 3 | 9 |
| 4 | -11 |
| 5 | 24 |
| 6 | -45 |
| 7 | 50 |
| 8 | -53 |
| 9 | 81 |
| 10 | -120 |
| 11 | 120 |
| 12 | -99 |
| 13 | 170 |
| 14 | -250 |
| 15 | 216 |
| 16 | -203 |
| 17 | 288 |
| 18 | -405 |
| 19 | 362 |
| 20 | -264 |
| 21 | 450 |
| 22 | -600 |
| 23 | 528 |
| 24 | -477 |
| 25 | 601 |
| 26 | -850 |
| 27 | 729 |
| 28 | -550 |
| 29 | 840 |
| 30 | -1080 |
| 31 | 962 |
| 32 | -821 |
| 33 | 1080 |
| 34 | -1440 |
| 35 | 1200 |
| 36 | -891 |
| 37 | 1370 |
| 38 | -1810 |
| 39 | 1530 |
| 40 | -1272 |
| 41 | 1680 |
| 42 | -2250 |
| 43 | 1850 |
| 44 | -1320 |
| 45 | 1944 |
| 46 | -2640 |
| 47 | 2208 |