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 | 1 |
| 4 | 4 |
| 5 | 1 |
| 6 | 1 |
| 7 | 7 |
| 8 | 0 |
| 9 | -7 |
| 10 | -1 |
| 11 | 1 |
| 12 | 12 |
| 13 | -12 |
| 14 | -56 |
| 15 | -12 |
| 16 | 12 |
| 17 | 1 |
| 18 | 1 |
| 19 | 21 |
| 20 | -67 |
| 21 | -284 |
| 22 | 0 |
| 23 | 284 |
| 24 | 67 |
| 25 | -21 |
| 26 | -1 |
| 27 | 1 |
| 28 | 38 |
| 29 | -273 |
| 30 | -1170 |
| 31 | 753 |
| 32 | 3408 |
| 33 | 753 |
| 34 | -1170 |
| 35 | -273 |
| 36 | 38 |
| 37 | 1 |
| 38 | 1 |
| 39 | 71 |
| 40 | -982 |
| 41 | -4241 |
| 42 | 8562 |
| 43 | 29055 |
| 44 | 0 |
| 45 | -29055 |
| 46 | -8562 |
| 47 | 4241 |
| 48 | 982 |
| 49 | -71 |
| 50 | -1 |
| 51 | 1 |
| 52 | 136 |
| 53 | -3314 |
| 54 | -13888 |
| 55 | 66335 |
| 56 | 199616 |
| 57 | -106113 |
| 58 | -464880 |
| 59 | -106113 |
| 60 | 199616 |
| 61 | 66335 |
| 62 | -13888 |
| 63 | -3314 |
| 64 | 136 |
| 65 | 1 |