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 | 1 |
| 3 | -2 |
| 4 | 1 |
| 5 | -2 |
| 6 | 0 |
| 7 | -1 |
| 8 | -3 |
| 9 | 2 |
| 10 | -6 |
| 11 | 1 |
| 12 | -4 |
| 13 | -3 |
| 14 | -3 |
| 15 | -5 |
| 16 | -4 |
| 17 | -7 |
| 18 | -6 |
| 19 | -9 |
| 20 | -8 |
| 21 | -14 |
| 22 | -10 |
| 23 | -18 |
| 24 | -18 |
| 25 | -20 |
| 26 | -28 |
| 27 | -27 |
| 28 | -38 |
| 29 | -39 |
| 30 | -50 |
| 31 | -57 |
| 32 | -67 |
| 33 | -79 |
| 34 | -94 |
| 35 | -109 |
| 36 | -128 |
| 37 | -154 |
| 38 | -175 |
| 39 | -213 |
| 40 | -244 |
| 41 | -292 |
| 42 | -341 |
| 43 | -400 |
| 44 | -475 |
| 45 | -553 |
| 46 | -655 |
| 47 | -768 |
| 48 | -905 |
| 49 | -1062 |
| 50 | -1253 |
| 51 | -1470 |
| 52 | -1732 |