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 | 1 |
| 2 | -4 |
| 3 | -9 |
| 4 | -11 |
| 5 | -21 |
| 6 | -31 |
| 7 | -35 |
| 8 | -50 |
| 9 | -65 |
| 10 | -71 |
| 11 | -91 |
| 12 | -111 |
| 13 | -119 |
| 14 | -144 |
| 15 | -169 |
| 16 | -179 |
| 17 | -209 |
| 18 | -239 |
| 19 | -251 |
| 20 | -286 |
| 21 | -321 |
| 22 | -335 |
| 23 | -375 |
| 24 | -415 |
| 25 | -431 |
| 26 | -476 |
| 27 | -521 |
| 28 | -539 |
| 29 | -589 |
| 30 | -639 |
| 31 | -659 |
| 32 | -714 |
| 33 | -769 |
| 34 | -791 |
| 35 | -851 |
| 36 | -911 |
| 37 | -935 |
| 38 | -1000 |
| 39 | -1065 |
| 40 | -1091 |
| 41 | -1161 |
| 42 | -1231 |