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 | -2 |
| 3 | 5 |
| 4 | 6 |
| 5 | -1 |
| 6 | -13 |
| 7 | 20 |
| 8 | -16 |
| 9 | 25 |
| 10 | 3 |
| 11 | 8 |
| 12 | 36 |
| 13 | -23 |
| 14 | -54 |
| 15 | 69 |
| 16 | 44 |
| 17 | -27 |
| 18 | -67 |
| 19 | 86 |
| 20 | -8 |
| 21 | 29 |
| 22 | -21 |
| 23 | 44 |
| 24 | -97 |
| 25 | 122 |
| 26 | 63 |
| 27 | -36 |
| 28 | 147 |
| 29 | -118 |
| 30 | -187 |
| 31 | 218 |
| 32 | -119 |
| 33 | 152 |
| 34 | 74 |
| 35 | -39 |
| 36 | 183 |
| 37 | -146 |
| 38 | -233 |
| 39 | 272 |
| 40 | 22 |
| 41 | 19 |
| 42 | -78 |
| 43 | 121 |
| 44 | 58 |
| 45 | -13 |
| 46 | -119 |
| 47 | 166 |
| 48 | 264 |
| 49 | -215 |
| 50 | -331 |
| 51 | 382 |
| 52 | -171 |
| 53 | 224 |
| 54 | 98 |
| 55 | -43 |
| 56 | -399 |
| 57 | 456 |
| 58 | 321 |
| 59 | -262 |
| 60 | 509 |
| 61 | -448 |
| 62 | -592 |
| 63 | 655 |
| 64 | 324 |
| 65 | -259 |
| 66 | -413 |