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 | 17 |
| 3 | -1 |
| 4 | 1 |
| 5 | 19 |
| 6 | 2 |
| 7 | 397 |
| 8 | -1 |
| 9 | -2 |
| 10 | 1 |
| 11 | 17299 |
| 12 | -1 |
| 13 | 1 |
| 14 | 107 |
| 15 | -65 |
| 16 | 523 |
| 17 | -359 |
| 18 | 2 |
| 19 | -3 |
| 20 | -71 |
| 21 | 1 |
| 22 | -2 |
| 23 | -11267 |
| 24 | 62641 |
| 25 | -1819 |
| 26 | -14653 |
| 27 | -4 |
| 28 | 7 |
| 29 | -1 |
| 30 | 1 |
| 31 | 1208 |
| 32 | -472663 |
| 33 | -10441 |
| 34 | 17 |
| 35 | -126 |
| 36 | -11951 |
| 37 | 53 |
| 38 | -4 |
| 39 | 323 |
| 40 | -2404889 |
| 41 | 5 |
| 42 | -907929611 |
| 43 | 36 |
| 44 | -431 |
| 45 | 3 |
| 46 | -3547 |
| 47 | -15616184186396177 |
| 48 | -5 |
| 49 | -3 |
| 50 | -349 |
| 51 | 3527 |
| 52 | -140131 |
| 53 | 17 |
| 54 | -71 |
| 55 | -901 |
| 56 | -2741617 |
| 57 | -2 |
| 58 | 10183412861 |
| 59 | -1 |
| 60 | 1 |
| 61 | -6 |
| 62 | 33728183 |