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 | -3 |
| 2 | -7 |
| 3 | -15 |
| 4 | -23 |
| 5 | -35 |
| 6 | -47 |
| 7 | -63 |
| 8 | -79 |
| 9 | -99 |
| 10 | -119 |
| 11 | -143 |
| 12 | -167 |
| 13 | -195 |
| 14 | -223 |
| 15 | -255 |
| 16 | -287 |
| 17 | -323 |
| 18 | -359 |
| 19 | -399 |
| 20 | -439 |
| 21 | -483 |
| 22 | -527 |
| 23 | -575 |
| 24 | -623 |
| 25 | -675 |
| 26 | -727 |
| 27 | -783 |
| 28 | -839 |
| 29 | -899 |
| 30 | -959 |
| 31 | -1023 |
| 32 | -1087 |
| 33 | -1155 |
| 34 | -1223 |
| 35 | -1295 |
| 36 | -1367 |
| 37 | -1443 |
| 38 | -1519 |
| 39 | -1599 |
| 40 | -1679 |
| 41 | -1763 |
| 42 | -1847 |