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 | -2 |
| 3 | 7 |
| 4 | -12 |
| 5 | 16 |
| 6 | -17 |
| 7 | 29 |
| 8 | -48 |
| 9 | 52 |
| 10 | -42 |
| 11 | 67 |
| 12 | -105 |
| 13 | 92 |
| 14 | -79 |
| 15 | 142 |
| 16 | -184 |
| 17 | 154 |
| 18 | -143 |
| 19 | 191 |
| 20 | -262 |
| 21 | 266 |
| 22 | -189 |
| 23 | 277 |
| 24 | -441 |
| 25 | 341 |
| 26 | -262 |
| 27 | 430 |
| 28 | -495 |
| 29 | 436 |
| 30 | -402 |
| 31 | 497 |
| 32 | -712 |
| 33 | 634 |
| 34 | -444 |
| 35 | 674 |
| 36 | -897 |
| 37 | 704 |
| 38 | -553 |
| 39 | 878 |
| 40 | -1118 |
| 41 | 862 |
| 42 | -766 |
| 43 | 947 |
| 44 | -1189 |
| 45 | 1222 |
| 46 | -807 |
| 47 | 1129 |
| 48 | -1753 |
| 49 | 1254 |
| 50 | -992 |