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 | 1 |
| 3 | -2 |
| 4 | 1 |
| 5 | -3 |
| 6 | 2 |
| 7 | 1 |
| 8 | -5 |
| 9 | 4 |
| 10 | -1 |
| 11 | 1 |
| 12 | -9 |
| 13 | 10 |
| 14 | -3 |
| 15 | 2 |
| 16 | 1 |
| 17 | -17 |
| 18 | 28 |
| 19 | -13 |
| 20 | 6 |
| 21 | -4 |
| 22 | 1 |
| 23 | -33 |
| 24 | 82 |
| 25 | -57 |
| 26 | 26 |
| 27 | -12 |
| 28 | 2 |
| 29 | 1 |
| 30 | -65 |
| 31 | 244 |
| 32 | -241 |
| 33 | 126 |
| 34 | -50 |
| 35 | 8 |
| 36 | 0 |
| 37 | 1 |
| 38 | -129 |
| 39 | 730 |
| 40 | -993 |
| 41 | 626 |
| 42 | -252 |
| 43 | 50 |
| 44 | -3 |
| 45 | 3 |
| 46 | 1 |
| 47 | -257 |
| 48 | 2188 |
| 49 | -4033 |
| 50 | 3126 |
| 51 | -1394 |
| 52 | 344 |
| 53 | -45 |
| 54 | 13 |
| 55 | -4 |
| 56 | 1 |
| 57 | -513 |
| 58 | 6562 |
| 59 | -16257 |
| 60 | 15626 |
| 61 | -8052 |
| 62 | 2402 |
| 63 | -441 |
| 64 | 91 |
| 65 | -18 |
| 66 | 2 |