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 | 0 |
| 2 | 0 |
| 3 | -2 |
| 4 | 3 |
| 5 | 0 |
| 6 | -3 |
| 7 | -7 |
| 8 | 16 |
| 9 | 2 |
| 10 | -15 |
| 11 | -21 |
| 12 | 31 |
| 13 | 24 |
| 14 | -15 |
| 15 | -57 |
| 16 | 34 |
| 17 | 25 |
| 18 | -17 |
| 19 | -27 |
| 20 | 77 |
| 21 | 8 |
| 22 | -99 |
| 23 | -111 |
| 24 | 155 |
| 25 | 117 |
| 26 | -36 |
| 27 | -140 |
| 28 | 40 |
| 29 | 25 |
| 30 | -80 |
| 31 | -96 |
| 32 | 259 |
| 33 | 112 |
| 34 | -157 |
| 35 | -249 |
| 36 | 202 |
| 37 | 183 |
| 38 | -156 |
| 39 | -354 |
| 40 | 224 |
| 41 | 203 |
| 42 | -40 |
| 43 | -62 |
| 44 | 342 |
| 45 | -21 |
| 46 | -524 |
| 47 | -548 |
| 48 | 562 |
| 49 | 488 |
| 50 | -34 |
| 51 | -358 |
| 52 | 194 |
| 53 | 167 |
| 54 | -262 |