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 | -3 |
| 3 | 0 |
| 4 | 0 |
| 5 | -5 |
| 6 | 11 |
| 7 | -18 |
| 8 | 18 |
| 9 | -18 |
| 10 | 28 |
| 11 | -39 |
| 12 | 39 |
| 13 | -52 |
| 14 | 66 |
| 15 | -51 |
| 16 | 51 |
| 17 | -68 |
| 18 | 68 |
| 19 | -87 |
| 20 | 87 |
| 21 | -66 |
| 22 | 88 |
| 23 | -111 |
| 24 | 111 |
| 25 | -111 |
| 26 | 137 |
| 27 | -137 |
| 28 | 137 |
| 29 | -166 |
| 30 | 136 |
| 31 | -167 |
| 32 | 167 |
| 33 | -134 |
| 34 | 168 |
| 35 | -133 |
| 36 | 133 |
| 37 | -170 |
| 38 | 208 |
| 39 | -169 |
| 40 | 169 |
| 41 | -210 |
| 42 | 168 |
| 43 | -211 |
| 44 | 211 |
| 45 | -211 |
| 46 | 257 |
| 47 | -304 |
| 48 | 304 |
| 49 | -304 |
| 50 | 304 |
| 51 | -253 |
| 52 | 253 |
| 53 | -306 |
| 54 | 306 |
| 55 | -251 |
| 56 | 251 |
| 57 | -194 |
| 58 | 252 |
| 59 | -311 |