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 | 10 |
| 4 | -13 |
| 5 | 26 |
| 6 | -50 |
| 7 | 50 |
| 8 | -45 |
| 9 | 91 |
| 10 | -130 |
| 11 | 122 |
| 12 | -130 |
| 13 | 170 |
| 14 | -250 |
| 15 | 260 |
| 16 | -173 |
| 17 | 290 |
| 18 | -455 |
| 19 | 362 |
| 20 | -338 |
| 21 | 500 |
| 22 | -610 |
| 23 | 530 |
| 24 | -450 |
| 25 | 651 |
| 26 | -850 |
| 27 | 820 |
| 28 | -650 |
| 29 | 842 |
| 30 | -1300 |
| 31 | 962 |
| 32 | -685 |
| 33 | 1220 |
| 34 | -1450 |
| 35 | 1300 |
| 36 | -1183 |
| 37 | 1370 |
| 38 | -1810 |
| 39 | 1700 |
| 40 | -1170 |
| 41 | 1682 |
| 42 | -2500 |
| 43 | 1850 |
| 44 | -1586 |
| 45 | 2366 |