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 | 2 |
| 4 | -3 |
| 5 | 3 |
| 6 | -9 |
| 7 | -1 |
| 8 | -10 |
| 9 | 0 |
| 10 | -18 |
| 11 | -6 |
| 12 | -26 |
| 13 | -12 |
| 14 | -36 |
| 15 | -12 |
| 16 | -29 |
| 17 | -11 |
| 18 | -41 |
| 19 | -21 |
| 20 | -51 |
| 21 | -19 |
| 22 | -55 |
| 23 | -31 |
| 24 | -67 |
| 25 | -41 |
| 26 | -83 |
| 27 | -55 |
| 28 | -95 |
| 29 | -65 |
| 30 | -137 |
| 31 | -105 |
| 32 | -138 |
| 33 | -90 |
| 34 | -144 |
| 35 | -96 |
| 36 | -146 |
| 37 | -108 |
| 38 | -168 |
| 39 | -112 |
| 40 | -166 |
| 41 | -124 |
| 42 | -220 |
| 43 | -176 |
| 44 | -236 |
| 45 | -176 |
| 46 | -248 |
| 47 | -200 |
| 48 | -268 |
| 49 | -218 |
| 50 | -296 |
| 51 | -224 |
| 52 | -294 |
| 53 | -240 |
| 54 | -324 |
| 55 | -252 |
| 56 | -324 |
| 57 | -244 |
| 58 | -334 |
| 59 | -274 |
| 60 | -394 |