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 | -2 |
| 2 | 3 |
| 3 | -5 |
| 4 | 7 |
| 5 | -11 |
| 6 | 13 |
| 7 | -17 |
| 8 | 19 |
| 9 | -23 |
| 10 | 29 |
| 11 | -31 |
| 12 | 37 |
| 13 | -41 |
| 14 | 43 |
| 15 | -47 |
| 16 | 53 |
| 17 | -59 |
| 18 | 61 |
| 19 | -67 |
| 20 | 71 |
| 21 | -73 |
| 22 | 79 |
| 23 | -83 |
| 24 | 89 |
| 25 | -97 |
| 26 | 101 |
| 27 | -103 |
| 28 | 107 |
| 29 | -109 |
| 30 | 113 |
| 31 | -127 |
| 32 | 131 |
| 33 | -137 |
| 34 | 139 |
| 35 | -149 |
| 36 | 151 |
| 37 | -157 |
| 38 | 163 |
| 39 | -167 |
| 40 | 173 |
| 41 | -179 |
| 42 | 181 |
| 43 | -191 |
| 44 | 193 |
| 45 | -197 |
| 46 | 199 |
| 47 | -211 |
| 48 | 223 |
| 49 | -227 |
| 50 | 229 |
| 51 | -233 |
| 52 | 239 |
| 53 | -241 |
| 54 | 251 |
| 55 | -257 |
| 56 | 263 |
| 57 | -269 |
| 58 | 271 |