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 | 1 |
| 1 | -1 |
| 2 | 2 |
| 3 | -1 |
| 4 | 5 |
| 5 | -5 |
| 6 | 3 |
| 7 | -5 |
| 8 | 6 |
| 9 | -10 |
| 10 | 10 |
| 11 | -8 |
| 12 | 13 |
| 13 | -15 |
| 14 | 15 |
| 15 | -16 |
| 16 | 23 |
| 17 | -27 |
| 18 | 25 |
| 19 | -30 |
| 20 | 35 |
| 21 | -40 |
| 22 | 42 |
| 23 | -45 |
| 24 | 55 |
| 25 | -66 |
| 26 | 68 |
| 27 | -70 |
| 28 | 86 |
| 29 | -95 |
| 30 | 100 |
| 31 | -110 |
| 32 | 125 |
| 33 | -141 |
| 34 | 150 |
| 35 | -161 |
| 36 | 185 |
| 37 | -207 |
| 38 | 215 |
| 39 | -235 |
| 40 | 266 |
| 41 | -293 |
| 42 | 310 |
| 43 | -335 |
| 44 | 375 |
| 45 | -410 |
| 46 | 438 |
| 47 | -470 |
| 48 | 521 |
| 49 | -575 |
| 50 | 610 |
| 51 | -653 |
| 52 | 725 |
| 53 | -785 |
| 54 | 835 |
| 55 | -900 |
| 56 | 983 |
| 57 | -1070 |
| 58 | 1140 |
| 59 | -1220 |
| 60 | 1331 |
| 61 | -1443 |
| 62 | 1532 |