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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | -2 |
| 7 | 0 |
| 8 | -21 |
| 9 | 2 |
| 10 | -39 |
| 11 | 30 |
| 12 | -144 |
| 13 | 88 |
| 14 | -118 |
| 15 | 176 |
| 16 | -187 |
| 17 | 374 |
| 18 | -731 |
| 19 | 651 |
| 20 | -194 |
| 21 | 1013 |
| 22 | -89 |
| 23 | 1605 |
| 24 | -1404 |
| 25 | 2327 |
| 26 | 325 |
| 27 | 3315 |
| 28 | 695 |
| 29 | 4627 |
| 30 | -5271 |
| 31 | 6215 |
| 32 | 2050 |
| 33 | 8093 |
| 34 | 3091 |
| 35 | 10411 |
| 36 | -161 |
| 37 | 13392 |
| 38 | 6187 |
| 39 | 16748 |
| 40 | 8140 |
| 41 | 20833 |
| 42 | -4072 |
| 43 | 25480 |
| 44 | 13633 |
| 45 | 30634 |
| 46 | 17212 |
| 47 | 36806 |
| 48 | 9537 |
| 49 | 43478 |
| 50 | 25716 |
| 51 | 51266 |
| 52 | 31113 |
| 53 | 60168 |