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 | -3 |
| 7 | -4 |
| 8 | 4 |
| 9 | 1 |
| 10 | 3 |
| 11 | -3 |
| 12 | -11 |
| 13 | 6 |
| 14 | 12 |
| 15 | -8 |
| 16 | 1 |
| 17 | 4 |
| 18 | -2 |
| 19 | -20 |
| 20 | 1 |
| 21 | 40 |
| 22 | -8 |
| 23 | -32 |
| 24 | 16 |
| 25 | 1 |
| 26 | 5 |
| 27 | 0 |
| 28 | -30 |
| 29 | -15 |
| 30 | 81 |
| 31 | 30 |
| 32 | -120 |
| 33 | 0 |
| 34 | 80 |
| 35 | -32 |
| 36 | 1 |
| 37 | 6 |
| 38 | 3 |
| 39 | -40 |
| 40 | -45 |
| 41 | 126 |
| 42 | 141 |
| 43 | -252 |
| 44 | -180 |
| 45 | 320 |
| 46 | 48 |
| 47 | -192 |
| 48 | 64 |
| 49 | 1 |
| 50 | 7 |
| 51 | 7 |
| 52 | -49 |
| 53 | -91 |
| 54 | 161 |
| 55 | 357 |
| 56 | -363 |
| 57 | -714 |
| 58 | 644 |
| 59 | 728 |
| 60 | -784 |
| 61 | -224 |
| 62 | 448 |
| 63 | -128 |
| 64 | 1 |
| 65 | 8 |
| 66 | 12 |
| 67 | -56 |
| 68 | -154 |
| 69 | 168 |
| 70 | 700 |
| 71 | -328 |
| 72 | -1791 |
| 73 | 656 |
| 74 | 2800 |