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 | 3 |
| 3 | -2 |
| 4 | -6 |
| 5 | 0 |
| 6 | 12 |
| 7 | 9 |
| 8 | -15 |
| 9 | -28 |
| 10 | 3 |
| 11 | 48 |
| 12 | 33 |
| 13 | -48 |
| 14 | -87 |
| 15 | 7 |
| 16 | 135 |
| 17 | 90 |
| 18 | -134 |
| 19 | -234 |
| 20 | 21 |
| 21 | 356 |
| 22 | 237 |
| 23 | -330 |
| 24 | -575 |
| 25 | 42 |
| 26 | 831 |
| 27 | 540 |
| 28 | -762 |
| 29 | -1296 |
| 30 | 107 |
| 31 | 1848 |
| 32 | 1191 |
| 33 | -1633 |
| 34 | -2769 |
| 35 | 210 |
| 36 | 3842 |
| 37 | 2448 |
| 38 | -3366 |
| 39 | -5634 |
| 40 | 444 |
| 41 | 7722 |
| 42 | 4889 |
| 43 | -6624 |
| 44 | -11028 |
| 45 | 840 |
| 46 | 14871 |
| 47 | 9342 |
| 48 | -12636 |
| 49 | -20877 |