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 | 0 |
| 5 | 4 |
| 6 | 4 |
| 7 | 7 |
| 8 | 3 |
| 9 | -2 |
| 10 | -9 |
| 11 | -17 |
| 12 | -25 |
| 13 | -24 |
| 14 | -13 |
| 15 | -1 |
| 16 | 32 |
| 17 | 61 |
| 18 | 97 |
| 19 | 111 |
| 20 | 112 |
| 21 | 74 |
| 22 | 8 |
| 23 | -108 |
| 24 | -243 |
| 25 | -392 |
| 26 | -512 |
| 27 | -569 |
| 28 | -542 |
| 29 | -358 |
| 30 | -33 |
| 31 | 473 |
| 32 | 1078 |
| 33 | 1788 |
| 34 | 2395 |
| 35 | 2865 |
| 36 | 2955 |
| 37 | 2569 |
| 38 | 1496 |
| 39 | -245 |
| 40 | -2751 |
| 41 | -5783 |
| 42 | -9121 |
| 43 | -12299 |
| 44 | -14739 |
| 45 | -15806 |
| 46 | -14719 |
| 47 | -10930 |
| 48 | -3813 |
| 49 | 6593 |
| 50 | 20284 |
| 51 | 36139 |
| 52 | 53081 |
| 53 | 68620 |
| 54 | 80539 |