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 | 0 |
| 1 | 2 |
| 2 | 0 |
| 3 | -3 |
| 4 | 0 |
| 5 | 0 |
| 6 | 6 |
| 7 | 4 |
| 8 | 4 |
| 9 | 0 |
| 10 | -10 |
| 11 | -10 |
| 12 | -10 |
| 13 | 0 |
| 14 | 0 |
| 15 | 19 |
| 16 | 24 |
| 17 | 30 |
| 18 | 12 |
| 19 | 6 |
| 20 | 0 |
| 21 | -35 |
| 22 | -49 |
| 23 | -70 |
| 24 | -42 |
| 25 | -21 |
| 26 | 0 |
| 27 | 0 |
| 28 | 72 |
| 29 | 104 |
| 30 | 164 |
| 31 | 128 |
| 32 | 84 |
| 33 | 24 |
| 34 | 8 |
| 35 | 0 |
| 36 | -150 |
| 37 | -216 |
| 38 | -360 |
| 39 | -324 |
| 40 | -252 |
| 41 | -108 |
| 42 | -36 |
| 43 | 0 |
| 44 | 0 |
| 45 | 343 |
| 46 | 480 |
| 47 | 820 |
| 48 | 800 |
| 49 | 710 |
| 50 | 400 |
| 51 | 180 |
| 52 | 40 |
| 53 | 10 |
| 54 | 0 |
| 55 | -803 |
| 56 | -1089 |
| 57 | -1870 |
| 58 | -1892 |
| 59 | -1826 |
| 60 | -1210 |
| 61 | -660 |
| 62 | -220 |
| 63 | -55 |
| 64 | 0 |
| 65 | 0 |